Hey Toddat an a15 has lower comp than a n a14 so that might be the go . Depending on the parameters of your blower you could do an a15block with an a14 crank and rods . Check out ferrals formula in the thread about s/c 1400, its an excellent guide for blower drive combos. I calculated that the s/c14 (1gg-ze on my 1400 would produce 16.7psi at 1-1 ratio.This is well beyond what the blower is capable of.