[Jakno]

Purchased a Project 33 PU several years ago complete with 59 engine. Have decided to get going on completing the truck. Started with checking the engine for issues. Compression check shows all cyl except # 4 to be 80 to 95 lbs. # 4 cyl is 34-40 lbs .All these cylinders are original parts except, #4 cyl intake and exhaust valves have been replaced. The low compression in #4 does not appear to be a valve problem although I am going to replace them with VanPelt valves.
The cylinder walls are what you would expect in this original engine and all 8 cylinders are consistent. I also have new head gaskets.

Would you share your thoughts on anything you might try before I have to tear down the engine. ..... Thanks