there ya go, some 411 for you
i happen too have some factory fans off my '97 Z28. maybe we could work something out in a trade for your 4.1 block and something else....
they can be wired for high speed or high/low
i'm parting my camaro out, this is one of a few items i still have left besides the entire roller
on my hybrid project, i'm going too use Flex a lite fans