Drive shaft length specs

garyfish340 said
So theoretically, if I have 1975 slant 6 duster, 904 w/ a 7 1/4, and I have a 1969 barracuda 340 727 w/ a 8 3/4, and I want the 69 drive train in the 75. I can swap the drive shaft, and rear into the duster first. Allowing me to drive that slant 6 / 904 combo, until I'm ready to do the engine, and trans, and all the parts will work properly.

The yoke for a 904 trans. is different than a 727 so it won't be a direct swap. It'd surprise me if the driveshaft length is correct also. A 904 is about 3" shorter than a 727 and a 8-3/4 is longer (yoke to axle centerline) than a 7-1/4... You'd have to be real lucky for the driveshaft to be the right length.