[foothills gary]

Replace the tranny with a TKO2 with .83 fifth gear.Your final drive ratio will be 2.95,which should give a very nice cruise rpm below 3000 at 70-75 mph.It's also highly unlikely that you will be able to break it with the hp&tq you are pushing.However with the Tremec's 3.27 first gear,you might as well write it off, and call it a 4-speed.

Gary