Post by seventyonehemicuda on Nov 11, 2020 16:16:29 GMT -5
This will be my first go round building a big block mopar bottom end for derby...You guys that are rebuilding a motor for the purpose of derby, anyone over-overbore. I've got a 400 that I'm putting some good parts into. I'm going to gap the rings a little extra for sure, but im considering boring a little extra I'm going with .030 over pistons, and I'm thinking im going to bore the block .032 over. maybe eve. as far as .035 this should allow for some expansion and still be tight enough to keep the skirts from rattling. anyone else ever try this?
Hi everyone, I was wondering if someone could help me out? I recently bought some stuff from an estate/farm auction in my area. The owner was a dedicated Mopar guy, and had everything from a 58 Dodge 2 tonne to a 69 Charger to a a 93 fwd Imperial and everything in between (unfortunately almost everything was rotten beyond repair and not even derby worthy . The reason for the sale was the owner had passed away and the kids are fighting amongst themselves, so getting information from them was next to impossible. I bought a bunch of Big Blocks that were in a pile in his shop, most which were complete or near complete. It was a mixed bag of stuff. 318 poly, 361, 400, and a few 383's. Now I have had 383's in the past and generally know what I'm looking for with casting numbers and date codes ect. In the pile was a 68 383 4bbl with no carburetor or exhaust manifolds. I don't know what it came out of, and there is no one to get any information from. I know where to look to identify a Magnum on the block with the casting numbers HP or HP2. Does anyone know how to externally identify a Commando block? I've done a little bit of research online, but have not found away to correctly identify a Commando block from a normal 383. If anyone could shine some light on this or point me to a website that could help me out that would be greatly appreciated. Thank you in advance.
Last Edit: Nov 20, 2020 11:11:35 GMT -5 by wildchild