You rebuild the pump but you dont know what the camplate or rollers are? You are in the shit :/
Edit, that was a very unhelpful answer let me ellaborate. The camplate is the round lumpy bit in the middle of the pump that sits on top of the roller cage that holds the rollers. Theres a spring that goes in there aswell. On the back of the camplate where the spacer sits is a little tab that locates the distributor head on the camplate, if this little tab isnt in line with the keyway on the driveshaft of the pump, the timing of the pump will be out, so you may of timed it up right on the cambelt, but the timing inside the pump will be off which = engine no runny. Hope that helps.
Edit, that was a very unhelpful answer let me ellaborate. The camplate is the round lumpy bit in the middle of the pump that sits on top of the roller cage that holds the rollers. Theres a spring that goes in there aswell. On the back of the camplate where the spacer sits is a little tab that locates the distributor head on the camplate, if this little tab isnt in line with the keyway on the driveshaft of the pump, the timing of the pump will be out, so you may of timed it up right on the cambelt, but the timing inside the pump will be off which = engine no runny. Hope that helps.
Doesnt even own a 306.