1993 f250 460 big block

Sounds like it could be the fuel regulator. You can test for this if you have a fuel pressure gauge hooked up.

I changed it out over the weekend but still have the same issue so i took the truck to a mechanic who told me that he thought it was a firing issue. He suggested i start by replacing plugs, wires, distributor cap and rotor, so i did but still no luck, i also noticed 2 broken vacuum lines so i fixed those as well but no luck. The mechanic said it could possibly be the distributor needs replaced. I have no clue at this point. Dont

Check the intake manifold bolts. Snug up the intake bolts.

Is there a vacuum line running to the distributor? Also is the distributor cap like a two piece cap?

Dont see any vacuum lines to distributor and no its just one piece. Just trying all options before i go buy a distributor without knowing if thats gonna be a waste of money too....

I was thinking if the timing was not advancing it would do the same thing. But it is electronically controlled. Like on a Chevy, there is a wire to unplug when you set the timing. It's ben so long since I worked on one of these, just can't remember. May want to pick that other mechanics brain on this. Another thing I was thinking about was the fuel delivery on this. How many injectors does this have? 2 or 8. You could do a fuel pressure bleed down test to see if the injectors are leaking.