When you pump the primer pump with the engine off is there a reasonable stiff resistance or not
The hand primer pump feels as it should, and after a couple of pumps I can hear the fuel going through the bypass valve. This is the original bypass valve.

Start with the easy stuff first, e.g. put a clear pvc line in place of the cigar hose to eliminate air in fue
When you ran the car using a temporary fuel can in the engine bay, what was the discharge rate of the fuel going into the can?
I will check these tomorrow, cheers.

The injectors were professionally rebuilt with Monark tips, I even took them back to be rechecked - I am assuming they are not leaking. Will post back.