Engine Cj7 304 crank won’t start
I have a 1976 CJ7 304 auto trans. A month ago while driving the water pump went out. I drove it onto my trailer and towed it back home. When I got back home it wouldn’t start. I pushed it off the trailer into the garage and I started looking into it before I started on the water pump and it was a bad ignition module. I replaced with a new module and started right up. After replacing the water pump I tried to start it to bleed the system and it just turns over and shakes while cranking. I checked for fuel and spark and I have both. It started once for maybe 5 seconds and it was rough as if the timing was off. But I did nothing to mess with timing. During one of the start ups it backfire through the carb. Is there any suggestions on what it might be? Everything is stock on it. Carb was rebuilt this year along with new fuel system, plugs, wires, coil and starter solenoid, i haven’t touch the distributor but it ran perfect before the water pump going out.