Crunch time: TH-400 or TH-350???

[tavenner13]

time to take care of the tranny. should i beef up my turbo 350 or should i try and land a th400? its going behind my 454 big block (mostly stock with a few street goodies: 280 cam, demon 850, eddy performer rpm dual-plane). im asking because i plan on getting some head work done this winter and instgoing through other things to get more grunt. just wonderin cuz i dont wanna have to do the same thing next spring cuz i didnt do it right.