mine is not on the road, but i did some calculations for it. it will have 39s 4.56 rear end gears, and a .73 OD. i figured that i could cruise at 75 somewhere around 2100 rpm. i have done all of the other upgrades to make the truck less scary at those speeds. i have d60/14 bolt with disk brakes and power assist and dual circuit master. 2100 rpm is nice for a BBC.
i am not an advocate for the body swap. i sy swap the newer driveline into the 715 if you want to get up to those speeds and make sure all of the equipment is safe for that kind of speed
Ryan
67 #18820 mostly stock...