I was just curious, has anyone had their TH-350 tranny rebuilt and beefed up with more clutches, stronger bands, hardened input/ output shafts etc..? Anyone tried the JET 350 transmission? The reason I ask is I want to build up a 500HP 470Ft LBS+ bored & stroked 400 smallblock, but the only thing I have to worry about is the tranny not being strong enough. I don't want to spend lots of money on my engine only to have to rebuild the tranny several times because it can't handle so much torque and power!? I don't want to go to a TH 400 either because crossmembers will have to be moved or drivelines will have to be shortened/ lengthened , I think. Anyone have any suggestions?