the engine is it own seperate harness from the transmission, I could just swap the harness since I get the entire 2 wheel drive truck, it's just recently was rolled 2 times but mechanically it's fine I'm figure use the 350 and change the harness if sensors don't work use the 350 computer on it might get an error code for the transmssion but mines mechanical so I'm not to worried, I figured the 305 flexplate would work on the 350, and very hard to pass up a 150 dollar truck thats runs good and was well maintained, good friends with owner he was on top of everything, thanks for the info thou see how it goes if I go to swap it