mobilortho I looked at speedway 4 link too it is a generic 500$ outfit that YOU have to make fit. So went to the oilfield supply store bought some schedule 160 black pipe 3/4 inch drilled and tapped for 3/4 heim joints from speedway. Read all that tech stuff on line, made my own setup load it if I need to works fine. Can adjust pinion angle easily,is all right hand threads, couldn't see any use of left hand threads since one or2 adjustments and your done !
