Backfiring out carb and wont run right

Get down to basics

TIMING. Set this and forget it. Wrench the engine around with the timing mark about 10 BTC or a bit more. Loosen the dist. clamp, rotate the dist CW (retard) and put a meter or test lamp on the points (coil NEG terminal). With key in "run" SLOWLY rotate distributor "advanced" (CCW) until the lamp lights or you get voltage on the meter. Snug down the distributor

ESTIMATE whether the advance works. Do this by "springing" the rotor CW. It should spring right back. This is the spring / weight mechanism of the mechanical advance.

COMPRESSION. Run a compression check, and if you can borrow or afford one, a leak down check. Horrid Freight sells leak down testers for 40 bucks

PLUGS. Check the plugs for fowling, and for cracks.

WIRES. Check the plug wires with an ohmeter. It depends on the type of wire, but if they are resistance radio suppressor wires, they will have some resistance. No wire should be greatly different than the rest. Take them one at a time, hook to your meter, and "shake" them. This should show up bad spots in the wires.

AN OPEN PLUG WIRE CAN CAUSE THIS

FIRING ORDER. Make ABSOLUTELY certain you have the firing order correct. It's VERY easy to switch 5 and 7. We have all done it, all of us.

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THEN

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Examine the cam........pull the covers, crank, and examine the valves for "all they all" opening and closing

cam TIMING. You can easily estimate cam timing, read your shop manual...........there's a procecure in there to do that.............

Download a factory shop manual, free, right here.........

http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617