Quote:

318/440 crank flange is the same. Most 440's are neutral balance. 70-2 HP & 6pk engines had a special balance with a steel crank. Starting late in 72 most 440's got the cast crank which is a special external balance with the exception being some of the truck and 4-speed engines.

Dan



70=71 hp 6pak are external balance the 72 hp are neutral balance.

Last edited by 440beep; 03/16/12 09:14 AM.
Plymouth's gonna getcha! There are 3 things that will live forever, cockroaches, Keith Richards, & slant 6 Dusters 71 gtx 440 4speed air grabber blue on blue with white vinyl roof