Originally Posted by MoreParts
Some of these 383s get a lean spot or stumble. If you find yourself in that situation get yourself the kit mentioned in this TSB on ePay or separately. The kit is pretty cheap if you can find it.

https://www.e-bodies.org/Resources/TSB/Carb_Engine_Lag_Stumble.pdf


That’s pretty much what I did for all the later race cars with Hollys. The Challenger did have a stumble but I attributed it to that big electric vacuum advance but didn’t know sh!t from apple butter back then to fix it.