There has been plenty of talk about no oil to the rockers and about a mysterious special head bolt,someone has mentioned there is two different head gaskets for the 235. One is for the 54 on back and the other is for the 55-62,the differences is the hole for the oil passage and if I can remember correctly if the earlier gasket is put on the later motor it blocks the oil going to the rockers. If thats the case thats what I had done to the 57 235 I rebuilt for my 37,it got no oil to the rockers and what I did to get oil there was to take a cut off wheel and grind a groove about a 1/8 of a inch wide and about 1/8 deep through the threads on the head bolt and now it gets oil. It might seem crude to do it thay way but it works and I dont it 4 years ago and no trouble since. Jeff
