I am working on a 1980 Firebird TA that was originally a W72 301. I read that this engine was used in the '80- '81 Grand Prix, I think SJ, model? Does anyone have one of these? It would have an electronic distributor and a timing module that retarded the timing and a detonation sensor at the rear of the block. I was wondering how this engine performed and if you were happy with it. I have a regular 301 in my Bonnewagon and I am looking to change the cam. This W72 engine had a better cam as did the '79 manual trans 301. I have the timing parts out of the TA if needed. Any feedback would be appreciated.