You guys should do some more research. Their is a guy who made 628whp with a 7rib 4age block gze crank rods and pistons all arp bolts and n/a cams. Mind you this was all with stock internals. Not to mention back in the 80s f1 cars utilized 1.5 liter motor that made upwards of 1800hp. Just sayin. And if i was to build any s series motor i would use a 99 5sfe block with 2nd gen 3sgte head. 5Sfe blocks have thicker cylinder walls not to mention the extra stroke.