We checked the plugs and two broke in half as we took them out! Bought a new set and left them with the gap they came with: about .045".
We then put on a Carter carb. They are much simpler than the Rochesters. It ran good but we couldn't test drive it because my tranny's throttle valve cable wouldn't hook to it. We then tried a different Rochester, a newer model than mine. Funny thing, it had a bracket that was easily adapted to hook the TV cable to! We had to Mickey Mouse the choke and a couple other little things that allowed us to take the test drive.
I'm a happier camper now! Now I've got a lot of things to tidy up. Springs, clips, and wiring to do right. And this week I've got a brand new exhaust manifold coming, so I might try putting my old carb back on just to make sure it was the culprit.
And, now that my brake light switch is fixed, I was able to hook up the relay that disengages the tranny's torque converter lock to allow it to come out of overdrive when slowing down. It too worked fine on our test drive. One more thing I can check off the list!