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Lowering blocks for Leaf Spring Diff hanger "U" brackets - suits a Spring width of 64mm
Weld on lowering blocks to suit our diff brackets - suits wide spings. Picture shows actual bracket.
Product Description

Part# KB-MSP-60-DLB40-LEAF-64 : Kustom Bitz diff brackets range are stronger than the standard OEM units ~ this lowering block suits our Leaf spring style bracket that welds to the differential axle tube. Made from mild steel this bracket is heavy duty 6mm thick plate. 
This part number is for the 64mm wide springs [2 1/2 inch]  and it lowers the car by an extra 40mm.

Note that all our Diff hanger brackets measure 15mm from the spring to the outer diameter of the diff axle tube.  Therefore to work out ride height from the top of the spring relative to your axle centre line, divide the axle tube diameter by 2 then add 15mm + 40mm and that will give you the centre of the wheel relative to the top of the leaf spring. These lowering blocks can be trimmed/cut down to taylor your ride height. Note that these lowering blocks are about as low as you would want to make them becasue any taller than 40mm and you typically make the bottom of the spring clamps and "U" bolts lower than the bottom of the wheel rim, which is not good engineering if you consider when you get a tyre puncture you do not want any parts of the suspension lower than the bottom of the lower edge of the wheel rim.  Those of you modifying utes will have to pay close attention to this also becasue the utes usually have more leaves per spring than a sedan.

Price is per unit ~ one only.
These lowering blocks have to be welded to your diff hangers. They are NOT desiged to be clamped in place. These weld on units are aimed at better engineering practice so that they get welded on and cannot move like the old fashioned alloy blocks.

For a matching leaf spring clamping plate click here.The KustomBitz range is available to suit diff tube diameters of 64, 71, 76 and 84mm which covers the most common Borg Warner and Ford 9 inch diffs. Other diameters can be made to size however the idea is that a small amount can be linished off if your tube diameter is within one or two millimeters of the avalable sizes.This particular part number is for the 54mm wide narrow springs and will suit a diff tube diameter of 64mmPart# KB-MSP-60-DT64-LEAF-54-STD : Kustom Bitz diff brackets range are stronger than standard units ~ Leaf spring style bracket that welds to the differential axle tube. Made from mild steel this bracket is heavy duty 6mm thick plate wich is thicker than a standard 9 inch diff bracket, it is also slightly longer, it has bigger folded returns on the ends for strength and it grips the tube for a full 180 degrees.K  :  axle tube

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EV conversion 1955 MG ZA Magnette by Kustom Bitz

by kustombitz on 04 Jul 2024
Kustom Bitz is doing an EV conversion on this 1955 MG ZA Magnette.  The job is a complete restoration and driveline conversion, it doen't look much at the moment but we have been pulling it apart to completely strip the paint for a full rotiserie restoration on the body.  The sills need replacing and the rear guards need some rust repairs but apart from that the body is mint. You can follow the restoration on We will be installing an air cooled Hyper9 AC motor and controller with two LFP battery packs, one in the boot and one in the front engine bay. The electric motor will sit in the gearbox tunnel with a Torque Trends USA Long tail housing reduction box, with integral park lock, like an auto trans has. The base EV technology that is going into this car has been around since the 1990s and I have been selecting, repairing and working on IGBT drive technolgy in the automation industry since that time, so combining my restoration skills and EV technology make sense to me. Intended as a city run around it should be a pretty stout combination as the Hyper9 puts out a similar torque to a stock 289 Windsor but from zero rpm all the way up. Rated at approx 200hp. The body is light weight at just on 1080kg stock, weight gets pulled out, engine and gear box [all cast iron], and the batteries is similar in weight so ends up around the same once finished.

41 Willys at Sydney Hot Rod Show 2024

by kustombitz on 04 Jul 2024
41 Willys coupe on display at the Sydney Hot Rod show, all bare steel body with a Kustom Bitz gasser modified chassis under it.

8:71 Supercharger install on 454ci powered '55 Chevy

by kustombitz on 30 May 2022
You would think a supercharger kit install would be pretty simple .... well no, is the short answer. A wise man once told me a 'kit' is not a solution.  And having worked on a few of these set ups now these words keep ringing in my head and I remember this old man who at the time I didn't think was that wise at all .... now I am older and I see.   In this install I had to port match the heads to the intake as there was a substantial lip into the head port because of the large intake manifold ports. If not corrected would have led to fuel puddling and fouled plugs and drivability problems that would have been hard to diagnose once assembled.  Also the distributor hole at the back of the manifold was off centre and way too big for a standard chevy dizzy and any aftermarket dizzy too. So I had to make a boss to take up the slack and provide a stable boss for the dizzy clamp to work properly.   To add to the woes, the engine assembler failed to pick up that it was a tall deck block and required a longer oil pump drive shaft .... that was hard to diagnose when a new engine loses oil pressure for no reason.   I got there in the end with modded accelerator links, better fuel line route, boost referenced carburettors and a proper harmonic balancer for a blower application.  The install was challenging on this one but the end result was a sweet running engine with monster amounts of torque to hall this heavy full size sedan around the hills .... and cool looks of course.  

41 Willys Coupe Gasser Chassis

by kustombitz on 30 May 2022
41 Willy Coupe chassis fabricated to original dimensions yet extra strength provided in the depth of the chassis and via tubular centre X member and many tubular cross members to take the weight and torque of a big block Ford drive line.  This chassis will have an original steel body fitted to it and the owner wants the whole car to resemble an early 60s drag car, right down to the rear radius rods that look like ladder bars, however it has to have nice street manners and pass ASRF construction guidelines for safe street rod engineering.  Now many may argue a leaf sprung front end and rear end is not the best handling street car and I would agree, but there are always trade offs for the look you want and the right combination of parts installed with the correct geometry can still yield a very nice driver with a really cool look.  When driven responsibly this 41 Willys will provide hours of enjoyment for the owner cruising around.   Chassis by Kustom Bitz [our custom designed rails], Engine Ford Hemi V8, T400 auto, 9" diff installed on leaf springs with diff housing floaters designed by Kustom Bitz for street use [so we have flexibility and suspension give], Super Bell front I beam with disc brakes cleverly mounted to parallel leaf springs without any mods to I beam and not relying on welded parts.   See our section on Hot Rod Chassis construction for more images of our various Willys Coupe chassis that Kustom Bitz has built.  

'67 Toyota Crown Ute - another air ride bagged project

by kustombitz on 01 Apr 2021
The Toyota Crown ute is progressing along, the body is fitting the modified original chassis and this is how it will look when it's dropped ... I think it has the right stance ... The framing you can see is holding the upper body together as the floor and lower sections are rusted away and have been cut out, then to be completely refabbed by us.  The frame allows us to lift the body on and off as we please during this stage.

1940 Ford Coupe chassis BBC 454 L80E 9" and air ride

by kustombitz on 01 Apr 2021
Kustom Bitz just completed a 35-41 chassis, stepped up at the rear and a reversed centre X member allow this chassis to sit 40mm off the deck. It runs a Rod Tech IFS, big block chevy and L80E auto, a 9 inch diff with floating hubs, all on modified original rails. Kustom Bitz has developed our own boxing plates that suit the original rails near on perfectly. Original Ford rails are curved from front to back there are no straight sections, so to get something that fits right we had to jig the chassis up and map them out.  This is what we do, when it just needs to be done right to make it a well engineered car.  This allowed us to make a nice transistion for a high step at the rear. We have designed in 6 inches of travel at the back, so this car can have a normal, almost stock ride height then dumped to the max when parked.

LS Engine swap and custom air bag IFS

by kustombitz on 19 Feb 2020
'67 Toyota Crown ute chassis build is going well. Got the LS engine and 6 speed manual box in place and we can use all the orginal serpentine pulleys, brackets etc. The narrow wheel track on the Toyota called for a tailored solution when it came to the front end.  These old Toyotas dont have service parts available any more so the front end had to be changed, so that made a brake upgrade alot easier too. We run R6 air bags from Air Ride sitting at a ride height of 6" for the air bag so got plenty of air volume in them for a good ride quality and a full length travel shock absorber so we get proper rebound tuning, along with a power steering rack.  So at the sill [belly of the car] we get a 5" ride hieght with a 4 inch drop, this thing will look great.

Double shear brackets - rear coil overs Hot Rod Chassis

by kustombitz on 30 May 2019
Recently in Victoria some engineers have called for the upper and lower mounts for the rear coil over shockers to be a double shear bracket.  The thoery is that the bolt has too much twisting force on it and it will break. Well thats why on Hot Rods we use a 5/8" grade 8 bolt in a single shear bracket application to over engineer it so it does not break. A typical OEM application uses a 1/2" bolt in a double shear bracket. However to please the engineer we have thought out a simple plate kit that can be welded in on the upper mounts as you see here to satisfy their requirements and should fit into most applications without too much effort or rework.  We have a lower mount bracket nutted out as well.

Diff bump stops custom made

by kustombitz on 08 Mar 2019
So many hot rod shops don't install proper bump stops.  In this instance we had to rebuild the shocker mounts on the diff as the rear end was bottoming out on the shocker travel becasue it had no properly designed bump stops in place. So the shock absorber mounting bracket was absorbing every bump when the suspension bottomed out, easy to see why both mounts broke. While we were repairing the diff I made a simple yet effective progressive bump stop that is held in place via the U bolts that hold the diff to the leaf springs. It turned out a very successful set up. This is yet another example how Kustom Bitz can sort out problems on your custom car or hot rod, its what we do.

Torana A9X custom made rear pan hard bar 9" Diff

by kustombitz on 08 Mar 2019
Back in the day Group C racing one of the tricks to get the Holden Torana to handle nice and be more predictable in corners was to fit a rear pan hard bar to give much better diff locating than the OEM triangulated 4 bars offered.  However the body, subframe and floor pan at the rear is no where near strong enoungh to concentrate the loads of pan hard bar in any one spot, so it has to be carefully planned and constructed, especially so in a street car like this that we cannot put a full roll cage in. You see in a race car I can place the roll cage in a position to pick up such loads placed on the pan hard bar brackets, but in this situaton we couldn't. The picture above is with the unit installed, keep in mind the car was just a shell so no weight was in it and the rear is sitting high. Once the full wieght of the car is on, it will sit fairly level.  It retains the original triangulated 4 bars however we run PU bushes in the bottom arms and ordinary rubber in the top arms. So the lower arms and pan hard bar do the locating and the top arms have some give so they don't bind with the pan hard bar.

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