Can't get Pro Parts headers to fit.

1968rt said
Schumacher sells a shim pack. The kit should come with a bunch of shims that fit under the mount. Different sizes which add up to over 1" of shims.

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i made some oversize 'fender shims' to space the mounts on my valiant when i swapped from /6 to small block. worked a treat and only had to loosen the mount, lift the motor and slip them in.