Hi All,

I got my Fall projects done and ready to start working on my Bird. Upon much advice on this board on my 455 blowing blue smoke on acceleration and getting poor gas milege, I did a compression test tonight per my '68 Pontiac Manual. All of the plugs were removed and the choke held open. I let the engine turn over approx. 8 times per each reading. The PSI readings are listed below

*Drivers side front to back
105
11 (tested this 3 separate times)
101
104

*Pass side front to back
98
107
107
110

All of the plugs were equally oily when removed and no build up. The manual suggested 150-170 psi for a standard reading for 9:2 to 1 CR engine. Mine is approx. 9:5 to 1.

I have my suspicions that I have a bad valve but the psi readings all seem low. I'm not sure if I was to have my heads redone it would correct the problem or a full rebuild is in order. Any advice would be greatly appreciated.

Thanks in advance.