Transmisison 904 vs. 727

engineers do a great job of finding a happy medium.Such as 318/904/8.25 When you decide to upgrade one whether you like it or not you will upgrade the others.350 h/p is about twice what your car came out with.904 is a great transmission and will hold up with upgrades also.8.25 kind of iffy.I have seen too many of them broke to say they hold up.