Re: 393 fe
You are getting good advice
I hate absolutes, but....there is no 352 that can go to 4.23 and not split a cylinder. 427 blocks are completely different
Very few 352 blocks can go 4.13 (428 bore) because 428 blocks are different (but not as different as a 427) and those that do, still risk splitting a block or becoming porous at some pit inside the water jacket from the backside. Guys will say they do 4.13 bore 390s all the time, well if they do, they don't build much power, or they go through a pile of blocks doing sonic checks.
More than anything though, remember, a strong stable cylinder makes more power and lasts longer than a larger one that is more flexible. Rings are designed to seal inside a cylinder with stable dimensions, the thinner the cylinder wall, the worse the ring seal gets and power goes down, and rings have to flex to follow, taking life out of them.
I would much rather see you build a 390 out of the 352, balance it, use light components and spin it to 7000, or leave 352 bore and add a 3.98 or even 4.25 crank and make even more power at lower RPM.
70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.