I went 9.90 @ 140 with a stock 4-bolt block, lunati crank, eagle rods, and lunati pistons. 383 ci with off the shelf brodix track 1s, a 600lift solid roller, a GT47-82mm turbo, and an air to air cooler.. It would have gone more like 9.40s with a clean pass, but only had 5 passes on it at low boost and was just starting to make power when I split the #2 main cap in half and destroyed my nice rotating assembly...
Now I have a 358ci (staying less than 360in for a class) bowtie block with billet splayed caps, crower crank, eagle 6" rods with L-19 bolts, amd JE dished pistons (9.5:1 with 67cc).. I have a Steve petty cusom grind solid roller, better Brodix track 1s than before, and a GT47-88mm turbo, but the rest of my combo is the same... put down 935RWHP on a mustang dyno @ 22psi.. prolly around 1200ish at the crank. Should be able to put down around 1200 at the wheels at 30psi with a lil more agressive of a tune (but still safe).
My advise is build a strong shortblock first, cause it's way too easy to make BIG HP with a sbc and a nice turbo... so you'll need a motor that can handle it...
Cliff