Hi everyone. The 700R4 trans. didn't work out for me. I'm very happy that several members are enjoying their overdrive transmissions, but I'm not going to try another one. I have to move on from my futile, costly experience. So, I'm looking at either the TH350 or TH400. I'm hoping someone can give me some direction as to which one would work better for me. My '56 gasser has a "W" engine putting out about 425 hp or so. The cam is an Isky hydraulic and is one level above stock. Sorry, I don't have the numbers. The rear is a stock 3.70 posi. My purpose of the car is some red light action, occassionally a run at the drag strip and to cruise mostly. By cruise I mean a longer ride going maybe 45-50 mph. I will run the car hard on occassion, but I'm not going to constantly beat it. I have the drive shaft and cross member leftover fron the 700R4 and would like to use them if possible with the new transmission, although it's not a given. So, which one would select and why??? Thank you very much, Carmine.