I have a '90 Century with the 3.3 V6 and was wondering if there is a turbo set that I could possibly get.

I wish but i dont think there is, maybe u could possibly modify one from a 3.1 to fit a 3.3.

what models had a turbo for the 3.1? it is possible, a 3.8 supercharger can be modified to fit the 3.3 with the 3.8 plenum