Vintage Air System not too cool????!!!!

If you run your fans continuous, your low side should show 15-20psi if you've got a sight glass on your drier it should show steady liquid flow, no bubbles. Your high side you wanna see 200- 225 . I would find an old timer that can charge systems for performance vs volume. I'm sure the mfg wants a specific volume but it depends how long your service hoses are and other variables like if the tech purged noncondenseables from storage or not. I always charge with the fans running across the condenser and charge w liquid. Good luck. The last thing , with the system running look for ice-ups along the high side lines indicating a possible obstruction also shoot temps across your evaporator coil again looking for ice-ups or sudden rise in temp again indicating obstructions. All across the face of the evaporater coil should be cold w no hot spots.return line back to comp should be cold as well . Does that system use an orifice tube or expansion valve. Valves sometimes fail not common.