So at some point I'd like to put in a manual tranny with my 3FE, but will be keeping that same tranny once I'm eventually able to do the 4BT conversion. My options are an NV4500 or an H55F. What say you guys as to which one would be the best option? I know with the NV4500 I can easily use it with both my 3FE and the 4BT. I'm not sure if I can do that with the H55F (just haven't checked around much yet). I know they're both stout trannies that'll easily handle the power of the 4BT, so my figuring is that it just comes down to what gearing I want.