383 Build

Know anyone with a forged 440 crank laying around. You could always turn down the 440 mains to fit in your 383 to give ya 438ci
Since your talking about buying aftermarket forged rods and still need pistons it's not going to cost ya a ton more and you end up with 55 more cubes.
440 source and a few other companys sell the whole kit and just individual parts for a stroker 438ci and even bigger if you really want to go crazy, just make sure you have a machine shop check out everything before assembly.
I really wish I had done this to my 383. The 400 block I have is getting a stroker crank for sure.