i got a used 750 holley double pumper and rebuild it. got it running good. it really gave it more power that u can feel. the 750 vac sec i had never really opened all the way. the vac sec was messed up. so anyone what to give me a guess what it'll do now ? before it ran 13.43 just about every run and once went 13.29. do yall think i can hit the 12's i want.thanks for ur input.