Need some imput

My friend wants to get a super charger for his 84' Camaro. Can any one give a price estimate. or a place to get a cheap one. And also i have a Chevy Scottsdale 10 and i didnt see a thing for my kind of truck. Its got a 350 in it and when i really push down the gas it will make a popping sound and it isnt back fire its like under the hood almost sounds like from the carb can anyone give any advice on that.

ebay has lots of used superchargers and some new for a good price mabye its runnin too lean or rich

Thanks for the help. I wish there was a area for chevy trucks because not very many have the kind i do.