I know why your having trouble......you have the radiator hooked to your brake booster.
TPI is the best injection invented. My 86 vette had it and i loved it.
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If it aint broke..............fix it till it is.
www.fast77.com
1972 - 330 hp crate, 11" lift with 39x18 mickeys.
3/4 ton, cross steer, 4 wheel disc brakes
1996 Z71 w/ 35's