My red 91 S10, got a new jasper but.....

Hello, just wondering if anyone knows a good gear ratio to upgrade my rear for the street without getting to crazy on gas just need more toque.Little 2.8 needs some help lol.But i once seen a turbo for that engine before but they are hard to find:( any help I will be grateful.


p.s. mangma flows sounds great on the 2.8 I had flowmasters once on a 92 2.8 kind a sounden rough because I had 3 inch pipes on it.