47-55.1 What's going wrong inside my 350?

[DransportGarage]

Originally Posted by burnin oil

Surprised no one mentioned this. Make sure that the valves arnt set to tight. It is really easy to do on a hyd cam. End result is a valve that doesn’t seat completely, if at all, and vacuum issues. I almost bet that one or two are tight and that is why you think the carb and dizzy need tuned more.

For the knowledgeable gear drive guys. Isn’t there a possibility of block interference with gear drive on some blocks? I could of swore I read that somewhere. I always just ran double rollers and never gave it much thought.

Both of these are good points. I'm remembering the way the engine ran in the one video, and that "chugging" sure could be caused by tight valves.