5 quick operation and Maintenance Qs

3500 RPM is pushing. Now that you know your timing is looking good without the vacuum advance, do you get any more advance with the vacuum hooked up? If not your vacuum diaphragm is done and needs to be replaced. I run around 3K on the highway maybe push to 3200 if I wanna keep up at 80. 3.23 gears in mine. What rear gear are you running? 3.55 I bet. Or your torque converter is slipping. That would cause some heat. Also how is you air cleaner connected. Do you have the stove pipe on that goes to the exhaust heat exchanger? could be getting hot air from the preheater being closed all the time (the little door in the air cleaner inlet). I'm gonna read from the beginning again and see if there is anything I missed.