Any AC Techs

Here is the pressure chart for R134:

Low Side High Side
85F 45 to 55 PSI 135 to 155 PSI
90F 45 to 55 PSI 250 to 270 PSI
95F 50 to 55 PSI 275 to 300 PSI

R134 runs at much higher pressures than the old R12. It looks like you could add a little more to get the high side up to 270 or so. Did you change out the oil? It will gum up if it is the R12 type of oil. Your vent temperatures look good though, and that is without recirculating the air.