8 3/4 conversion 67 barracuda Notchback help and info

Depending on the year of the housing, you may have to get a longer rubber brake flex line. Before 1970, the distribution block was closer to the hump of the housing, 70 and later it was moved down the drivers axle tube a ways. Also, the shock plates and U bolts will need to be 3”, as the axle tube is larger on an 8 3/4”, and the driveshaft will need to be shortened to 48 5/8”. I would use your front yoke as a guide, put it in with about 1 1/2” of the shaft showing so it has some travel, and measure cup to cup to confirm the length.