AC R134a Retrofit

Ok, I got my AC working today and the vent temps are to warm.
It was 101 degrees with 40% humidity today and my vent temps are 75 degrees. Are these temps about normal or should it be cooler?
What I've done so far is a new condenser, new drier. new expansion valve,
resealed the compressor, remove the EPR valve, full system flush and all new o rings. Vacuumed it down to 29" for 45 minutes, filled it so i have 40 lbs pressure on the low side at 1200 rpm. The high side is about 250 psi.
What did I do wrong, and can it be improved on?