Slant 6 Vibration

Ok fellas....time for some good (minimal), bad (possibly a lot), and the ugly (all signs point to yes.

While I have all the mainifolds off for replacing bad freeze plugs, I decided to do a compression test on all cylinders. Yes, I know it's ideal to do it after the engine is warmed up, but I wanted to get an idea of what I was looking at, at the worst.

Here's my readings:

Cyl 1: 95
Cyl 2: 35-40 (Why God, Why?!!?)
Cyl 3: 115
Cyl 4: 118
Cyl 5: 100
Cyl 6: 100

On Cyl 2, I got a 5lb jump just using some fogging oil I had on hand, I need to go get some standard oil and try again, but I'm not expecting much more. One weird thing when spinning over the engine on Cyl 2 is I can hear either a clicking noise or a degassing noise like a "PSSS" when doing the compression test. I didnt hear that same noise on any of the other cylinders. Not that I want it to be more than needing valve adjustment, but at worst, I'd rather it be a burnt valve over lower end problems like the cam. When the oil was changed last, the oil looked worn but fine, no sparkles or flakes in it. Any thoughts? I've considered getting a cheap borescope to check out the valves without having to pull the head....yet.

EDIT: just FYI, before all of this it ran ok, decent power, good pickup, no smoke but had a bit of gas smell from time to time. It did have the "clackety clack" when I tromped the gas, which was variable (it seemed) based on my experimentation with timing.