Hmm.. I'd have to say for the fan the cheapest and best way would be to find one out of a markvIII if you can. I would upgrade the amp too though. What year z28's are you trying to beat? Are you racing them drag or rally?
What octane gas do you use?If you CAN run a kenne belle with 6lbs of boost without pinging then definately go for it. That and the gears will give you HUGE off the line torque and if you can remotely hook up then I'd say you ought to be able to smoke lt1's and slightly edge out ls1's.
I would also upgrade the throttle body and suspension and get some drag radials so you can hook up all that torque you will have.
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92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe
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