I don't claim to know anything, but a 250 chevy should make 350hp easy with a turbo. and 350hp in 3000 lb car should run 12's 100 mph+.
Also a turbo makes lots of torque and only needs to turn 5000 rpm to make hp not 7000 therefore it is easy on parts , this is what makes it a great street setup. the compressor flow is what determines the hp limit not so much the engine size.
I think a 250 w/ stock crank, stock rods w/floating pins and ARP bolts, (I have made 500+ hp with 292 stock rods), TRW forged pistons w/ good rings (not moly,if you detonate it),
220* at .050 114* L/C cam, bump port head w/ stainless valves, stock HEI w/MSD digital 7 & coil & good wires, INNOVATIVE exhaust manifold and wastgate ,A duel 2 barrel manifold with C&S aerosol carbs , air to air intercooler , 60-1 turbo w/Q trim turbine w/.81 a/r . 10# boost= 350hp, turbo will make 550+ at 20# boost (race gas),
any automatic trans with 3000-3500 stall,
3.90 gear w/ 28" tire
just my thoughts.
