Hello I am new to the forum, went online to try and help my Dad out with a problem. I grew up with Oliver tractors and my Dad is still on the farm,he sold the milk cows about 15 year back and since then has bought fixed and sold probably 20 Olivers. 

He is having a problem with a super 77 he labeled his evil 77. After overhauling the engine, putting in new pistons and sleeves, it will run great untill it warms up, then overheats, pulled the head off and #1,2 sleeves are cracked around the top. piston sleeve protrusion measures under .004.

I didn't like where the headgasket seats  towards the inner part of the sleeve, but he tells me this is the only headgasket available anymore and he has done many other Super77s and not had this problem. Any advice would be appreciated, Thanks, Roy