I thought all .489,s came with the 7290 u-joint?I,m also going to make my own drive shaft.I have a slant 6 904 going to a 7290 yoke on a .489 8 3/4.It sounds odd but I just got the car and it has all brand new clifford 4bbl. intake,headders,dual exhaust and also a brand new holley 4bbl..I want to try out the motor for a while,then down the road i,ll have a proper V8 shaft made.