Quote:

It will have a cast crank and externally balanced. The harmonic balancer should read on the outer ring as follows; "440 cast crank only" It will vibrate with the 318 flywheel unless it is balanced for a 440 cast crank.

It can be used but it needs rebalancing as mentioned

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)