I've got a 1974 GMC Sprint project car. It was originally a 350 small-block Chevy with a TH350 trans, but I sold the engine and trans and installed a 454 [big-block] and TH400 trans in it.
Within two weeks after buying this neglected, yet miraculously unmolested 1966 Chevelle Malibu from its second owner, the first thing we did was install polyurethane body mounts from Energy Suspension ...