I HAVE A 89 C1500 W/A 5.0 TBI. I PURCHASED A TWIN TURBO KIT FOR IT & ALREADY UP GRADED THE FUEL PUMP,INJECTORS,& T-STAT. DOES ANY ONE KNOW OF AN UPGRADE FOR THE STOCK PROM IN MY TRUCK OR OF A NICE SIZE CAM I CAN USE?....THANK YOU FOR ANY ANSWERS!!  

You're putting two turbos on a stock 305? There are a lot of problems here. First off, why are you wasting your time and money on this? Secondly, are you trying to destroy the engine? Because if you set the tune at any level beyond 450 horsepower you're going to destroy some of those stock components.

Twin turbos for this vehicle is a complete joke. Even one turbo would have to be de-tuned just to not cost you an engine. I sure hope you're a forum troll/poser and have not bought this kit, and I especially believe this to be true because I can't think of a company dumb enough to sell something like this.