So. No compression on that cylinder 2 at all. Very low compression on the others, from 40-60 psi. When I shoot air into them, I can hear it in the intake and feel maybe a bit coming out the exhaust. A little piece of lightweight plastic bag laid over the top of the dipstick hole doesn't budge, and a glug of oil added to the cylinders adds maybe 5 psi to the compression test, if that - do I dare assume that the rings are in at least useable condition?
If there's a good chance the rings are ok, I'm just going to throw a new head at it. If I have to do the rings too, I'll consider snagging a used block. What do you guys think?