When I bought my 5.0 it was with an automatic so wanting to be smog legal and got a computer from the wreckers. They sold me a 8LG. Worked great except no check engine circuit - check engine light didn't work neither did the plug. I just put in a 8LD and my light works! Smog here I come! Course it ran for about 2 seconds and died - now I have zero fuel pressure. If it isn't one thing its another..