New Brake Bleeding

I did a search and then went thru all the threads on bleeding brake issues and I have yet to find any answers to my problem.
All the lines have been replaced along with the 74 Valiant front disks and 1 ton wheel cylinders on the Dana 60 rearend. I did bench bleed the mc before bolting it in. I have used a MityVac that a friend of mine said was in good working order. Since I have never used one before now I took his word for it. I am getting fluid in the catch bottle when I bleed all corners but the pedal still goes to the floor.
I have even tried having my wife pump the pedal while I bleed the brakes the old school way but still nothing. I do get a good stream of fluid but pedal still doesnt stiffen up.
I have checked all the fittings, hoses and connections and I cant find any leaks..

What do you think?

Thank you
Rick