The narrow casting seam means it is a cast crank as Double vision said .another sure way is take a small ball peen hamar lightly tap counterweigkt a forged steel crank will ring ,a cast crank will have a thud sound, Note : counterweight NOT the Journal
12-09-2012 06:45 AM
I had a Crosley Hot shot crank for a Demo when I taught in the Auto dept at the College. The hot shot was machined from a large round bar. It had counter weights on each side of the rod throws. Theoretically you can get some teeter- totter effect in a crank caused by balance weight location, but a forged crank has stronger metal structure resulting from the forging process. But the hot shots were high reving stock.
12-09-2012 09:16 AM
chev ss take a picture like gearhead posted,perfect
12-10-2012 05:32 PM
Hey guys thanks for the tips and info. I figured out my crank is cast which I kinda new thats what it was but sometimes u never know with GM. The crank is in pretty good shape and I plan on reusing it. Thanks again