i have a 91 d150 that is tbi 318. it has a non lockup 518. i will use it for a project but from what i have seen/heard, some guys with more hp want this trans because they can put their conv in it without spending big bucks for new conv. i d it by it having 2 pin connector not 3 pin. i have a friend that uses the patc kit and i have one on shelf for my next project. good piece.