360 cid with thermoquad
It starts runs smooth but ant any moment (while driving) it backfires out the carb and stalls out then it takes a while for it to start up again. I replaced the carb all the plugs and wires. It still is doing this. Could it Be a blocked Cat convertor; timing chain and gear slipping; ignition module..Im not sure...what could it be or where should i look first to resolve issue. TY

How many miles? I recall that the 70's 360's had a problem with the timing chain stretching in about 70-80k miles.

Does it run fine at higher rpm in neutral, but start to bog when you put a load on it, or when running slowly? Timing chain symptom. I wouldn't count out the cap and rotor also, you didn't mention that you'd replaced them.

Ignition parts shorting out,
Timing chain.
bad cam.
worn valve springs.

Not likely the Catalytic converter. Ususally a clogged cat wont cause the motor to shut off, just noticeably loose power.

I replaced cap and rotor. It backfires while in drive only like after a few miles. It is a 1980 dodge van. (Some say it May be a ECU, Coil, fuel pump or Ballast resistor)(does this year even have a ballast resistor)...:banghead: Im about ready to start working on on it again and hope fix it soon

I have had a bad valve guide and the rocker moved good but every once in a while it would change position and the engine would miss and then run properly. Pull the valve cover and watch. You can move the valve by hand if worn.