They are pretty thick. In fact, I remember somebody on here saying that the 400 was an overbored 383......but since the 400 has its own series of casting numbers and it was produced well after the 383, I don't know if that's factual or not.
They are pretty thick. In fact, I remember somebody on here saying that the 400 was an overbored 383......but since the 400 has its own series of casting numbers and it was produced well after the 383, I don't know if that's factual or not.
The 400 probably has a bit more, I have what was an unbored 400 that was given to factory sponsored SS racers. I bought it from a friend who is a retired east coast Super Stock racer that had Chrysler sponsorship back in the 70s and 80s, he ran a 383 in SS/GT, he had 5 of them I think and this was the last one left. He had it bored to 4.25 and it was put in his friends pickup truck for a few years to stabilize it with many heat cycles. I didn't check it with my sonic checker but he gave me a sheet which I have somewhere and at 4.25 bore it is about .300" thick everywhere. I bought it for my Super Stock 383 70 Challenger project which I haven't gotten to yet. I decided to build a Stock Eliminator 383 for it as I had a nice set of legal Ross pistons. I just finished decking it and when I get caught up with the engines I currently have buyers for and the one for the clunker 62 Dart, I'll assemble the Stocker 383, it's a 69 block that I filled with Halco machine grout and similar the 65 block for the Dart it's mostly in the .200" range at the major and minor thrusts at .060" over.