Stop in for a cup of coffee

WTruo said

I think my 360s hurt! I was checking compression and cylinder #7 shows a max of 70, #5 reads 120. And as of recent its been idling funny. It pops and backfires then dies. I squirted some oil to see if it would change but it didn't. My battery also ran low so its charging.

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Valves both closed,and air into cylinder.at least you will know which way the compression is going. Tailpipe,carb or crankcase.
I would hope for intake or exhaust valve leaking over broken rings.
I broke the porcelain out of a spark plug, and welded an air fitting to it. Low pressure air is all you need.