Ok I took the 7 1/4 out today to see how the 9 1/4 overkill rearend would fit. It has to be shortened but the covor doesnt hit the gas tank, the U-joint fits perfectly in the yoke, the drive shaft doesnt need to be moved, In other words. Heres future reference:
When installing a 9 1/4 in a 69' valiant100 2 door with 727 and 7 1/4, rearend swap only requires you to shorten the axle 4'' on each side to match the stock 7 1/4 width. A magic U-joint or custom driveshaft is not needed (thanks for the help though
). Also, the perches have to be removed and welded closer in.Actually you could just move the perches and mount it as-is, then your wheels would be popping out and be funny looking. Mopars look sexy with big rubbers tucked way up there anyways.
As for shortening it; Else I take the axles in to be chopped, Does anyone know of axles i could look for in a junk yard? 5x4.5 bolt circle for that 9 1/4