Well its a the wire harness and all components are out of a 91 astro van. (ecu, sensors, wire harness, tbi) im still running thr old 1 bbl intake so i picked up a adapter plate online from 1bbl to gm tbi. The dizzy took almost 3 months to order factory but im glad i did. It is not modified at all. Mainly cause i wanted to get the wiring sorted out first. I think i need to do some eprom or something for proper tuning. As the astrovan is a 4.3 and mine is 4.1. However i think yours would probably be pretty much perfect for it?