Rear Springs for 1967

Q: Rear Springs for 1967

Does anyone know if there is such a thing as aftermarket multi-leaf springs that will directly bolt with a 1967 mono-leaf rear end? My mono-leafs seem to have sagged a bit over winter, or I didn’t notice before I put it in storage. I would much rather have multi-leafs than replacing the inferior mono set-up. Any leads would be appreciated.

A: All the “re-pop” companies sell replacement springs and the multi-leaf springs will bolt to car with a few problems. The problem is when you go to bolt the multi-leaf to the mono-leaf rear-end. The multi-leaf have a centering bolt the hold all the leafs together. The mono-leaf rear-end have no provision for this bolt. You can install a set of spacers between the perch and the spring to remedy this problem. Otherwise, with new longer U-bolts they will bolt right up.

A: The perches are about one inch deeper on cars that came with multileaf springs than monoplate equipped cars.

A: Having done this swap (from mono to multi) I can verify that the perches are different. The reason being is the through bolt at the center of the springs. This bolts holds all the leaves together. The bolt head sticks out of the bottom and there is no provision for this on a mono leaf perch. You can buy a spacer to slip under the spring that has a hole in it for the bolt. Otherwise, you’ll have to remove the old perches and weld in new ones.

A: No stock or aftermarket spring is made that uses the mono-leaf hardware.

In order to use multi-leaf springs on a mono-leaf car, you need the following:

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• leaf spring and shock anchor plate-2 ea. (these plates differ from the mono-spring type)

• leaf spring U bolts-4 inches wide-2 pair (longer, obvously, to bolt the thicker multi-leaf springs)

• rear shock extenders-2 ea. (multi-leaf type shocks are 2 inches longer, due to the new spring and shock anchor plate)

• spring shackle bolts-4 ea. (yours are probably rusted and will break when you remove them)

• leaf spring pads-2 ea.

Classic Industries sells a complete kit with all of the above parts for $69.95. This does not include the springs, which are $179.00 (on sale) a pair for 4 leaf, and $129.00 for 5 leaf. Some people have reported a stiff ride, and a taller than expected ride height with 5 leaf springs.

In addition, I’d suggest new bushings and possibly shackles as well.

A: I was just talking to the owner of a local Pontiac speed shop about my sagging rear leaf springs. He recommended that I look into a set of fiberglass mono-leafs instead of retrofitting my 1967 rear end with the Classic Industries multi-leaf kit. He couldn’t remember who the manufacturer(s) were but said that “they advertise in various Pontiac magazines from time-to-time”. Does anyone know where to get them, and has anyone had any experience with them?

A: Check out www.vettebrakes.com and look under camaro suspension.

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