My problem is I don't have a good pedal when I first press it, One pump and it's great and and hold pressure after that.

I just recently switched from power to manual brakes, I bench bleed my master cylinder twice as well as the brakes. Because it reminds me of having air in the system.

Right after I got the car I converted the rear to disc, I've always had to pump the pedal at least once to get a good feel with it. I believed it was because I didn't have enough vacuum for the booster, but it's still doing it now.

I didn't install an adjustable porpotioning valve, could that be the issue? The only other thing I'm concidering it being is maybe the rear hose is collapsed? It's the only thing other than steel lines that I haven't replaced on the brake system.