That is another possibility . Sleeve protrusion on your car
I just did mine after refering to the book. 60 for the 504 head was what it said.I thought the cylinder head bolt tension is meant to be way more than 50 or 54 ft/pds. I think I did my 2L 504 to 75 ft/pds last time I had the head off (about 3 years ago).
I just did mine after refering to the book. 60 for the 504 head was what
Good idea. Muck in a thread can give a false torque reading.Bolt holes reminds me, I should get a thread chaser to make sure the threads are all clear and the bottom/s free of rust or crud.