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429 engine vibration

691 Views 3 Replies 2 Participants Last post by  429ragtop
I just swapped a cleaveland for a freshly rebuilt 429 in my 73 and am having some minor to moderate vibration as I rev the engine. This is in park, not driving. Any help would be greatly appreciated.

429, edelbrock performer intake, cam (hydrualic), and 750 carb. Scorpion full roller rockers, msd street fire ignition box, blaster 2 coil, mallory comp 32 distributor, autolite 45 spark plugs gapped at 45.
cylinder compression 180 psi all cylinders
any help would be greatly appreciated
1 - 4 of 4 Posts
Check your motor mounts, tranny mount, and your harmonic balancer for starters. Also checks to make sure that your drive shaft is balanced.
has new crytes motor mounts and new prothane tranny mounts, balancer appears to be a good used one
it was the prothane tranny mount. Replaced with stock rubber mount- vibration was gone.:bigthumbsup Beware of using poly type material for mounts:nono:
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