I posted a question regarding my carb problem yesterday and got no responses.Today I did some more work on this carb.I removed the spacer thinking the misalignment might be the problem.No better.Than I put a vacuum gauge on and set the timing using it.Advanced dist. to get the highest steady reading(21) and back off till it drops about 1 inch of reading.Now the timing marks are advanced about 25 degrees from proper mark on damper.Motor starts fine hot.This has improved the driveability.Now at least I can take it for a run.There is still "delay" of about 2-3 seconds before more fuel kicks in when the pedal is depressed further.This is happening at all speeds.It will cruise at a set speed but is sluggish if more pedal is applied.I checked the plugs and they look OK maybe a little lighter than normal.This is with the limited driving done to test it.I believe the carb is running lean.The build sheet I got with carb says 512 primary and 54 secondary.I have never heard of 512 jets.Disconnecting PCV makes no difference either.Anyone have experience with these 390 Holleys.If I want to change the jet size what should I go with?Any other suggestions on my problem?Thanks Mark