My engine rocks and shakes the whole car!! Need Suggestions!!

The .484 Purple ,works so well in a 440.

Agreed!!! This car runs so well (other than the rocking) even though I beat the crap out of it!! Ran a best of 14:06 bone stock, footbraking to keep from breaking out, but did anyway. Should've taken it's first ever 13 sec. run instead!!LOL!! It's been a great car!! Geof