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Engine treatment for 71 vette?

My mom just bought a immaculate 1971 stingray vette, with a built 350 with a lumpy ole cam and 421rwhp. The numbers match and the thing is beatiful. However the rebuilt engine has only 1000 miles on it and that was 7 years ago! One cylinder has a little lower compression then the others, but improved all summer after they put on about 3000 miles.

My question is can anyone reccomend a good engine treatment additive or system (cost no object) that might help loosen what I think is a sticking ring and bring that CR back to to the others? I know prolong as a system and some others...any ideas? Thanks







Edit: Title (12-03)
 
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Call the guys at Cn'V Corvettes out here in Phoenix. They've got a massive shop, and I'm sure if you get the right guy on the horn he'll be able to help you (and your mom) out with the CR problem...
 

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Jesse, remove the spark plug from the cylinder and fill it up just a bit with Kerosene or regular trans fluid (or Marvel Mystery oil) without any friction modifier. Let it sit over night, then remove the distributor coil wire (to make sure it doesn't start) and crank her over a few times while holding a rag in front of the hole to prevent oil or kerosene from spraying everywhere. (be sure that you don't hold the rag directly up against the plug hole or the intake stroke could suck the rag into the hole!!!) Once you're sure the cylinder is out of fluid, put the plug back in and fire it up. It may take a while to fire depending on how wet everything still is. The kerosene or trans fluid will have loosened the rings up a bit and should restore some lost compression.

BTW, had a 70 vette with 510 WHP... neener neener neener! LOL! :rofl:
 
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