Just built a 1988 LB9 305 and I'm having one hell of a time mounting the 1985 TH200C trans. I'm trying to use the stock 1985 converter with a 1988 flexplate. I just can't seem to get it to line up. What I have: 1988 1pc rear roller SBC from a 1988 Trans AM 1985 TH200C trans and stock converter...