I found this interesting on a search-

"Check to see if you have the "hot idle compensator valve" on your carb., its basically a bi-metal strip that when open, allows a passage to the manifold vacuum. Most hot-rodders (in my day), fashioned a block off plate to eliminate this really crude emissions device. I remember that being a common problem."


Could this be giving me trouble? Either for the high idle on return or the general rough idle? I know I have issues that will cause the idle to be rough currently but is this something to invesigate? I know a compensator isn't in there.