What i'm wondering is what is the difference in length between a 465/208 combo, and a 700r4/np208 combo? I swapped to a 4spd manual w/ overdrive and it was the same length as the 700r4/208 combo. Mounted to the same bolt holes on the frame and everything. I didnt have to do any mods to the driveshafts. My tranny is starting to sound like its gonna blow up and i'm considering bolting a 465 to my hydro bellhousing but am wondering if i'll need a new rear shaft. Anybody help?? Thanks.