Pedal goes to the floor... And i am stumped

I believe that truck has a RWAL brake system so you may want to look up the procedure for bleeding, might be more involved than just the old pump and hold especially if you drained a lot of the fluid out.

I was a Chrysler tech. Sometimes when we did brakes on an ABS system we had to use the scanner to bleed the brakes especially when replacing major components like a master cylinder. That computer is pretty primitive/archaic so I doubt it would have anything to do with it but it's worth a look just to rule it out.

Check to make sure you have everything plumbed correctly - proper lines going to the proper ports, etc. and you didn't switch the front and rear circuits somehow.

Also, disconnect the vacuum line from the booster and cap it off and see if it changes the pedal feel. That might help to nail it down. Power brakes without power assist will be tough to operate, it will take a lot of effort for very little braking power.