Ok I've put a 93 model 454 from a suburban in my 94 Sierra step side. Ok now can any one help, with the wiring. I pulled every thing from the Burban except the harness under the dash. I'm trying to marry the two together. I know that this was not too smart but did not have had anything to do. O but we do have regrets now but to late must go forward. Any body got any ideas. I got it running, runs good on jack stands, but when you drop it and take off she wants to spit and sputter. WT Heck. Replaced the knock sensor, put it on a code reader and had a 43.