383 block

[darkfiire5000]

I have a 68 383 block and am going to buy a 71 383 block for the crank is there any difference in a 68 to a 71 crank??

[frederick]

Don't think so.
The thing to look for is if it's got a forged or a cast crank.
http://www.moparts.org/Tech/Archive/bb/50.html

The forged crank is the one to have as it's stronger, but if it's a standard build I don't think it will matter much.

[John_Kunkel]

A '71 383 2-barrel would have a cast crank if coupled to an automatic, 4-barrels were all forged.