First off, I hope everyone has had a great holiday, and I wish everyone the best in the new year. Now onto my problem..... I have a 413 RB block that I want to build for my 63 dart. It is a 63 block with high nickel content, and I got for next to nothing, along with heads which are complete. So after doing a little research I've found that getting pistons for the a 413 isn't easy. There are a few companies making some low compression OEM's which I don't want. Some of you out there may be saying, just pick up a 440 it's easier. I agree with that, but I don't have one of those yet, so I'm stuck with the 413. I've done a little research and found that both the 426 RB and the 383 B blocks share the same Piston bore (4.25). My question is, has anyone out there considered boring a 4.13 block from it's 4.187 bore to the 4.25 bore of a 383/426 blocks? I think this is somewhere in the area is about .060 over, which I think is pushing it, yet doable. If I went this route, I believe I'll have a great selection of pistons and compression ratio's available to me. Lastly, is this idea totally far fetched, as I plan on running a 4.15" crank in this engine as well?
