[951mat]

I broke a valve spring at run-n-gun and decided to pull the motor to freshen it up, especially since I didn't know what kind of internals it has. Good thing I did, because we found at least one spun rod bearing and a broken cross main bolt. My engine guy says its a 428 crank b/c of the large counter wieghts. I know a 428 is balanced externally, but my alum flywheel looks like a 427 and the front sleeve on the crank doesn't have that counter weight on it either. The flywheel does have some holes drilled on the edges though. Could this enging be properly balanced like this?

Mat