Help with 413 Build please

Abodyman said
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?

Dude, I have owned mopar my entire life.I see all the nonsense people who don't know what they are talking about. A 383 or 400 block with this or that crank is absolutely rubbish! The 413 is absolutely fantastic! Yes you will need custom pistons but that's OK. The 413 has a smaller bore, aka less rottating mass for the rod angle with great piston speed capabilities. I like the 4.25 stroker crank.this would create an absolute wicked vacume signal creating lots of torque to cubic inch ratio. I have a 413 ready to hit the machine shop! I'm cramming it full of billet stroker crank & indy cylinder heads with a fuel injection 6 pack, yes 3 2 barrel throttle bodies lol. The 413 will rev ultra fast creating velocity in the intake stroke with the multiple throttle bodies. Any factory cylinder heads in this day & age are garbage! The cost of rebuild & repair are not worth the money. Aftermarket aluminum heads are the only way to go. Yes I know all the cheap people on these sites try to talk factory junk up but that is just talk. I guarantee you will be very impressed with a 413 stroker! Sure the 7.2L have more displacement, however the 413 has some unique characteristics that makes it superior in some aspects. Good luck with the 413 bud, it will be awesome. Don't listen to these bench racers, they build things in their imagination not in mopars.