Thank you. I'm not sure how many miles are on the 340. From what I am told, the engine was possibly rebuilt about 15 years ago. The motor was pulled out of the car when I received it but the car was running ok prior to this. The valve play seemed pretty loose when I first looked at the valvetrain before I did any adjustments. My dad thought the motor had hydraulic lifters and told me to adjust them no lash plus a quarter turn. I did this and motor wouldn't run. He then told me that the motor probably had solid lifters. (He lives 1,000 miles away). I adjusted the valves cold 24/26 and car runs but not as good as it should. I don't know if it is supposed to be this way or not, but my reality is that the more I tighten the adjusting nut on the rocker arm, the less compression I get in cylinders. I can't provide any photos of the motor with the intake removed.
