drive shaft

I just pulled the driveshaft out of my Dart last night. Before I pulled it, I measured from the back of the tail shaft to the center of the front U-joint. The measurement I got was 3 1/2".(this was on a 904 trans)

Insert your stock driveshaft into the trans so you get that 3 1/2" measurement. Then measure from the center of the front U-joint to the center of the rear U-joint. Give that measurement to the driveline shop