Next project is to reinstall the original 7043270 800 CFM carb. The man I bought the car from purchased an NOS 800 CFM, 17054910 service replacement SD455 carb from HO Specialties twenty years ago and installed it because he thought there was a problem with the carb. It turned out the problem was with the TCS system cutting off the advance, so he routed the vacuum advance directly to the carb and cut out the TCS system. The car ran fine then, but he never reinstalled the original carb. So I will get a carb kit and replace the needle and seat, and the accelerator pump with something that will tolerate the new ethanol blended fuels we have to put up with. Then the original carb goes back on.
Here's what's on the car now. 17054910 dated "1140" 114th day of 1980
And the original 7043270 dated "0133" 13th day of 1973: