Y'all are having him fix a self steering issue, not a no assist issue?

Seems to me that if, and the OP doesn't say, there was assist before the pump rebuild and now there isn't it's probably not the control valve.

Did you bleed the system when you put the pump on?

The 68 FSM makes no mention of fooling with the control valve on the steering gear with no assist in either direction.

From the FSM, first two are pump related, last one is steering gear.