still rough 429

what are the symptoms of a burned valve or severe carbon buildup? just wanna know if I may need to clean her out with some strong cleaner.

Don't know if its something dire, but the car still runs real nice. it's gotta be something simple or at least something that doesn't require severe surgery.

I forgot, have you done a compression test on the engine? New Carb? Tune up?

what if i have a kinda gurgaling sound coming from my valves at full throttle? are the seats or guides worn? or is it the rings?

i have had a professional tune up, and a new carb, but that isn't the problem. anymore. ive narrowed it (with professional help) to a HUGE VACCUM leak. Thank god. Now I just need to know what's up with my valves. I have replaced or recalibrated just about everything under the hood except the valves and cylinders and the motor is in too good a shape to have shot cylinders.. It has just been sitting, so my seals may be bad.

Gurgling? And at full throttle only? Sounds funky; are you sure it's not the air intake or something?

(glad it's just vacuum, that makes it easier, or at least cheaper)

Yeah. It does it when I am on the freeway, and I need to speed up to pass or just cause I am cruising. would fuel grade have anything to do with this? I don't drive like a speed demon, but i know what the thing should do.

It's a 70's vehicle, right? It may need some higher octane; try an octane boost product, or just fill up with high test.

Hey, thanks. I'll definitely try that. Thank you for all of your help.