f100 stalls in gear

these are the things i have narrowed it down to carb is a possibility but vaccum advance,fuel pump maybe i doubt it though (fuel filters brand new), and torque converter is a slim possibility.

it dosent drive at all and i know it has a major exhaust leak so im assuming it has an intake leak as well but i drove it home from chief land Florida to Pinellas county which is a 200 mile drive my buddy decided to adjust the car and timing im not sure what else he did and he does not remember since then iv replaced the entire ignition system done timing and adjusted the carb

no

it just stalls out

and its a fight to start it up

but if im in park the car lets me hit the gas and rev it

ok what is the best way to check the torque converter without removing it if their is a way at all

iv had no problems slipping overheating or anything tranny related that im aware of

i got her to drive a foot by flooring it but died directly after

I have a 1969 ford f100 240 6 cin it starts up good plenty of power when it idling but going down the road it's like it cuts off then it picks back up and the power is weak can you tell me the problem thanks

Ok thank you