Idle shake

[mando440dart]

Valves hanging open? Check the valve train.

 

[shep76]

12" vac in gear or neutral?

Neutral

I should do another compression test. I looked through my notes. 120 was the lowest. 140 was the highest. I don’t have a leak down tester. I did take off valve cover this week and noticed small bits of sludge.

 

[shep76]

Valves hanging open? Check the valve train.

I’m not really sure how to do that. I may need to get a book.

 

[toolmanmike]

This motor was in the car when I bought it so I’m unsure of the cam. Has decent compression little lower on number one cylinder. Brand new carb, new wires, has the pertronix conversion. I’ve searched for a vacuum leak without much luck. I’m going to pull the motor fairly soon to paint it but curious what you guys think this low vacuum/moving need issue is? It seems to want a ton of timing advance. Runs decent but the shake at idle is annoying

The vacuum is not that low and the needle isn't fluctuating enough to worry about. The engine doesn't sound like it's running rough and the cam is not big enough to have much lope. There's 3 pages of guesses here that could drive you crazy if you chase all that has been mentioned. Put the air cleaner back on, close the hood and go have fun.

 

[RustyRatRod]

I’m not really sure how to do that. I may need to get a book.

You've already done it. It's called a compression test.

 

[MOPAROFFICIAL]

Probably a stock bottom. Drive until it burns too much oil and then start over.

All due respect to everybody saying it's okay... 20 lbs shy in one is not okay.
Do a leak down to identify the culprit and
plan on a new motor down the rd.

12" in neutral with tiny cam is ****!!!