wondering if i could get away with a .63 a/r turbo on a 5.0 sbc according to turbonetics for around 400 horse a .68 a/r should do but i can't seem to find one in my price range

What is the size of the turbo though .... like a 48 ... 62 ...76 mm ? I am not sure if it matters ( think it does) , but I think it would help others help you .

well there's two that they suggest, a t04e-60 and a t04b both with .68 a/r

what is your price range this is the one I just purchased approx 1700.00 new
*High Performance C117 Compressor and UHP Turbine*Brings GT Ball Bearing performance to the 700Hp class*V-band turbine outlet flange*T4 Turbine Inlet Flange






Horsepower 400 - 700
Displacement 2.0L - 6.0L

Ball bearing




GT4088RCOMPRESSORTURBINE751470-1 751450-9751470-2 751450-9751470-3 751450-9751470-4 751450-9 TrimA/R 63.5mm88.0mm520.72 63.5mm88.0mm520.72 63.5mm88.0mm520.72 63.5mm88.0mm520.72 77.0mm 78 0.85 Free Float 77mm 78 0.95 Free Float 77mm 78 1.06 Free Float 77.0mm 78 1.19 Free Float
TURBINE HOUSING OPTIONPart Number448375-18448375-19448375-20448375-21 Wh DiaTrimA/RType --0.85Free Float --0.95Free Float --1.06Free Float --1.19Free Float Oil & Watercooled Bearing

yea 1700 dollars is definitely out of the question, i was think hopefully under 300 bucks, but i mean i'm not looking to make 400 horses out of the engine i'm thinking maybe a little over 300, so would a turbo that is .63 a/r be big enough to support that much??