2WD 3.9L 92 Dakota stalling and acting really...wierd...

Okay, so, short trips in town the truck does fine. But after I've driven around for about 30-45 minutes it starts to stall like its being starved for gas. 50% of the time if I put the pedal to the floor it'll stay in the ame gear and at the same speed, the other 50% of the time it'll upshift and jump forward like its at Talladega, but it never really quite rights itself, once it slows down it starts to have the same problem again. Then if i turn it off to let it sit for a few minutes, it'll start right up but it wont idle. It stalls out and dies unless i hold down the accelerator. But if it sits for an hour or more it'll start right upand drives fine then the problems persist. I learned on Mopars and have to say, I'm dumbfounded. All filters, fluids, and gaskets have been replaced within the last 600 miles. Also, not sure if its related, but about 10% of the time when i put the pedal to the floor it'll shift a little harder than what I'm comfortable with, but only when its having the stall out issue. So, like I said, I'm at a loss for words. Sombody please help because this is my daily driver. Oh, it's also a Throttle body, not injected or carb'd.