forged crank?

[dazedduster]

can anyone tell me how to tell if the crank i just got off e-bay is forged.
Its suposed to be out of a 383.

thanks

 

[66dartgt]

visually a cast crank will have sharp parting lines on the counterweights, forged cranks have thick parting lines. Probably a casting number would tell you as well. Most 383's were forged up until the later production years for this motor.

 

[dazedduster]

where can i find the forging number

 

[demon seed]

Try going to www.moparts.com/Tech (capital T in tech) and go to engine then big block, scroll down to crank Q's and ID. got pictures and easy to see difference. There was a cast crank in 71 on 2 barrel 383's other than that they were all forged and in 72 they were all 400's.

Terry

 

[dusterdon]

Easiest way to tell? Tap it lightly with a metal hammer. A forged crank will ring and a cast one will thunk.

 

[dazedduster]

Thanks guys, it's forged now off to the machine shop