So I start to leave a friends place in my 1950 half ton with a 3 speed tranny & 216. I didn't take time to let it warm up really good but took off anyway. About that time another car got in behind me. The driveway was slightly uphill & about halfway up the engine started coughing & running rough (like it usually does when it's cold) and then began to buck violently. Since it was pointed uphill it was really bucking & shaking me in the seat! Like each time it was about to die but then would lunge forward again. It really caught me off guard. I was trying to reach out for the choke but it took me a couple of attempts. Finally pushed the clutch pedal & hit the brake, not wanting to roll backwards into the car behind me. Now here's the problem.......... When I shift from 2nd to 3rd it is difficult and the gears grind. Feels like I really have to tug hard to get it out of gear. Also now sometimes it suddenly jumps out of 3rd gear. What happened? Obviously something got either out of alignment or broken. Shift linkage? Was the clutch damaged? Throw out bearing?

Thanks for any advice.

Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod