GofastRacer:
I agree caps braking is a rarety, they just walk around and cause problems. But if you're in the poor house(like me), you start out with an EARLY thick wall 2 bolt and add the splayed caps for serious shit. For a naturally aspirated 500 to 600 hp motor, 2 bolt dealios work fine with studs!. I agree though on the reasale, it is harder to sell a 2 bolt motor!.. For years the parts I have run have been used or from swap meets. I ran tall decks because they were all 4 bolt mains and could be had for $400 or less. But my thinking has changed the last few years. By the time you buy an old used block plus fully prep the block (line hone, boring, decking, etc), you got close to $1,000 in it. That's your foundation. All your high dollar stuff is rotating in this "cast just strong enough to make the warranty period" block. But with all the nice aftermarket blocks available for $2000.00 or less, I've gone to the aftermarket blocks. They have stronger main webs, pinned main caps, superior oiling systems and allow bigger bores for more compression with flatter domes. And a guy might be able to pick up one of these used and save some $$$ as more of them get out there.
With blown alcohol I have walked the caps on every GM block I ever had, studs, or not. I don't know about the P&S Block in the Fiat or the Dart block in the boat as I haven't looked at them yet. But I suspect they will be better.