Originally Posted By: Astro14
Only hot (not cold) rules out driveline (u joints, cv joints, driveshaft bearings, etc.).
My money's on a misfire. Bad plug, cable, coil, or injector...possible vacuum leak causing lean running but shaking is usually one cylinder not firing.
No check engine light?
Its a 75 Ford. The owner mentioned he leaned out the carb, I would try putting the carb back and seeing if it settles out a bit. You may be running rough under load while hot due to being too lean.