You can get a slightly used supercharger kit for $1500-2500 or a new one for $2500-3500. A turbo setup is easily twice that price but the supercharger would be lower boost(4.5-6 lbs) and maybe add 80-100 hp. A turbo has more overall potential for power, but like I said, if you're not getting the motor built for the boost then you're limited to the 4.5-6 lbs of boost. I ran the Powerdyne 4.5 for 4-1/2 years on my old 93 Z28 Indy Pace Car with no problems(42K miles on the supercharger).
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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