I have a 1977 D100 reg cab/short utiline box with a 9 1/4 rear axle, 225 slant six and a 3spd column manual. I picked up an A833 4spd o/d truck trans and correct slant six bellhousing, but now I need to find a driveshaft. Does anyone know the length of the driveshaft that I need to find for my setup?