That S10 of yours has the LT1 tho. It probably would work at higher rpm's anyway. As for the 700r4, i was thinking the same thing, but my block originally had 180hp, and i pumped it to about 250, with the air intake, exhaust, fuel pump, and a few other things. I'm planning on dropping a hot cam in it, but, i don't know how well that's going to work with my computer.