SBC 283.. 66 Impala

[CHEVYLV3R]

Hello I own a 66 Impala 4 dr. with 283 auto all Original except Carburator and a New Paint Job.
This car has sat quite a bit in the last 2yrs due to the fabrication and new Paint.
I used a fuel stabilizer and started the car every now and then while it sat. The engine ran pretty good except for a small ping,little miss and seemed to run a little rich. When I would start it up, it would have black suit and then burn off as it warmed up. I recently finished the paint brought the car home changed Oil,Oil filter,Air filter,spark plugs,plug Wires,Cap and Rotor,and fuel filter. Car ran fine but still had a miss and less suit coming from tale pipe when first started.I had drove the car everyday for about a week and decided to get new points but in. So I had mechanic change the points and all was good for about 3 days. I took the car up to Fill it with Gas drove another 4 miles shut it off then restarted and started to Drive and thats when i had a problem.. It started jug jug jug and started losing power. I was going about 10 mph when this happened all of a sudden. I crawled the car to a parking lot and started to chk into the situation. Fuel was getting to carb, no wires had came off and nothin out of ordinary. kept tryin to start it and couldnt keep it going.
So I asked a friend to help me out. He came over and messed with the Timing and carb just to keep it running so i could get home. The car had barely any power and only would go about 5 mph and jug jug jug stalling along the way. He told me sounded like the Timing Belt Jumped.. Anyone else have any ideas ? Before I spend money I really dont have... Ty for your help p.s anyone in central Illinois wanna come take a look email me :P