Motors Repair manual from the 1960's or so should show a good layout picture of the correct angle of each rocker..Make sure the oil holes are on the bottom if I remember right.There was a time not too long ago I had them apart all the time but each time I had to refer to Motors to be sure..If you don't find a manual let me know by E Mail and I will describe it for you from one of mine..Good luck..Al..Rockmanor@msn.com
