if for any reason you do not have the funds for a flex-o-lite, alot of guys are using a dual purpose ford taurus fan along a relay, wires, etc. alittle bit of wiring but they work fantastic.
i bought a set of 2 electric fans off ebay. they are like 900cfm each and i daily my s10 with an LT1 in it. stays cool. also just bought a set for my bodydrop with 350 swap. they were $45 shipped for both with mounting shit.