Don't know what to tell you, had a HP 350 with a TH400 shift kit and thought I would have rather had a TH350 W/shift kit, have now a 383 Vortec Stroker with 700r4 don't know if I like it yet or if it works properly, it is shifting different then when I first installed it and have to race it hard to get it to shift and it really shifts hard and turns some heads, I don't really know what I got because I got it from craigslist from another town. Really depends a lot on what you want to do. After you decide maybe you would like to consider an over under overdrive. Or see if you can have this fixed and beefed
