Low compression 2 cylinders

[Metaphysico]

If your compression tester is like most it has an air chuck fitting on it, take the schrader out of the hose and the radiator cap off and hook an air line to it while its on the worst cyl. If the coolant starts to overflow or bubble then you have a bhg. Either way with those values I would think bhg, rings are not normally a problem on these car, or at least you will have lower values in all the cyls. Also bent valves don't normally happen so that should not be an issue either. If you want to check the rings, put a small amount of oil or trans fluid in the cyls and redo the compression test, if you get a large increase in compression it will be rings..