290 horse 350 chev.

I have one of these crate motors in my model A. It has a new Edelbrock 1406 carb on it and it shakes on an idle. I tried another carb and it was the same. Is this a character of these motors or do i have a different problem? I have run out of ideas.

 

Do a compression test ,ck for vacuum leaks,ck for a flat cam.

 

I would check plugs,spark,timing

 

Your firing order might be off too. I think it should be 18436572

 

Pull plug wires one at a time and see which one doesn't matter. That will be the one where the ignition is dropping out.

 

Check motor and tranny mounts.

 

Do what Scotty said first...check the ignition. If you have a flat cam, it'll sneeze out the carb on quick acceleration. Probably ignition though.

 

I have that engine in my '62 Suburban, and have over 20,000 trouble-free miles on it.

Check ignition first... sounds like you could have the distributor in a tooth off, or other timing screw-ups.

-Brad

 

Thanks for the tips, i will check these things over the weekend.