All my parts were Mopar including the shafts. Yellow Rose is correct Mopar stuff is built wrong. At least my shafts were. My rocker holes were correct. I smoked my intake push rods ends until I understood what the hell was going on. My shafts had the holes drilled in the wrong places for the intake rockers to get oil on the push rod side. I just cut banana grooves in them to fix the problem. Also I used Comp Cams push rods. They make ones that you have to cut the correct length and put the end on. I can tell you they are hard as hell so if you go that route ordered extras you gonna screw at lest one up making them.