head casting 3835499 is used in multiple part numbers and maybe machined differently - swap with caution
head casting 3835499 is used in part # 3835545 for a 235 engine 50-53 in USA, these are likely babbitt 235s
head casting 3835499 is used in part # xxxxxxx also found on Canadian 216 51 engines (block 3695408)
head casting 3835499 is used in part # 3703569 for a USA 54 261 engine
