Weird Edelbrock carb noise

[B736866]

Originally Posted by hamjet

I would put the old dizzy back in and see if it still acts the same or not...

I really appreciate all of the replies guys. This has me and my buddies stumped so all the help I can get is very helpful.
It was making this same odd noise with the old points style distributor that is why I replaced it.

Originally Posted by Zeke's Garage

Can you hook up a vacuum gauge to the engine while it idles and see if it stays steady, or is fluctuating? Something sounds really odd. The way it revs really slow sounds like retarded timing, but it's tough to tell without putting hands on it. Verify TDC by using the piston, you can't trust an old harmonic balancer, they tend to slip on the rubber ring.
Sounds like more than one thing might be going on here, so also check your spark plugs.. its' really easy to crack the ceramic while handling them and you'll end up with a misfire.

Good luck with it.

I will have to get my hands on a vacuum gauge and test it out. How do I use the piston to find TDC. I just used the finger over the spark plug trick in order to get TDC after I replaced the dizzy. Could this also be a result of a bad timing chain?