The problem is in the head bolt that goes through the center rocker shaft stand. It oils through the threads,when I rebuilt the 57 235 I have in my 37 I did not pay any attention to the head bolts and put thread sealer on all the bolts not realizing thet it oiled through the threads. What I did to get oil to the rockers was take the bolt out and with a die grinder with a cutoff wheel ground a slot through the threads about a 1/8 deep and reinstalled and retorqued and now the rockers are getting oil. Another thing I might do to keep more oil in the rockers is crimp the oil tube on the end so all the oil that goes to the shaft comes out on the rocker arms.Jeff