Got tabs on it for the first time in over 10 years and drove it around a fair amount today after changing the jetting in the carb. Here's where it's at now:
Primary/Secondary
Idle jets: 70/60
Main Jets: 150/155
Air correctors: 180/170
Runs quite a bit better but I was noticing a bit of a sulfur/egg smell from the exhaust sometimes so guessing I'm a bit on the rich side now in some conditions (cat converters make that smell when running rich).
Still not running like I think it should. Power drops off pretty significantly after 4000 RPM. It'll pull to 5000+ but there's no point in revving that high as it runs better down low so shifting earlier around 4500 is best at WOT.
A very annoying problem has cropped up with the carb. Once the engine gets good and hot from driving around the carb starts to get sticky and the throttle plates won't close all the way, resulting in an idle speed around 2000 RPM. The linkage nut is NOT too tight, the adapter actually has some wiggle in it.
I have a friend who owns an auto shop so drove by there and he looked at it and thinks the throttle plate on the primary side isn't centered properly in the bore and is binding in the bore when things get good and hot and the metal expands to a certain point. I may need to sand down the primary throttle plate a little bit...
He also loaned me a combo pressure/vacuum gauge and a plate with a fitting that goes where the O2 sensor goes in the manifold so I can see what my back pressure looks like while driving around.
