I have a block which I was told was a 429 CJ with a code DIVE-6015-AA. I've researched this and it should have the thicker webbing...but it doesn't. The pistons it came with say 429 on them, and the block has 460 stamped on it. What is this block?

 

it's D1VE-6015-AA, not DIVE ....
the D for 1970 and the one therefore means 1971

maybe this helps:
http://429mustangcougarinfo.50megs.com/decoding.htm

 

Im still confused though because I thought the D1VE-6015-AA 429 blocks had the thicker webbing.

 

Pretty much all cj but the early ones where 4 bolt mains and there is even a thunderjet which is kinda worthless.

 

This block is a 2 bolt main, not 4.

 

The webbing is 1". From all that I have read, and looked at it looks to be a 429 CJ, but I cannot understand why 460 is on the end of the block, and inside.