I have a 1995 3500 2wd 4. 10 gears with 175,000 miles and I need help deciding which southbend clutch I need. Only mods to the truck so far is a #5 plate,k&n air filter,straight pipe. Planning on more mods in the near future. Should I go with ofe or fe? Also what are the best mods for the nv4500? Thanks.