That's the plan Paul.
Guye might be able to turn up later in the week so some of these can be checked then.
I have borrowed a fuel pressure gauge and will do an inline test when I can.
I think the code scan is going to be my best source of guidance, though we will see.
Frustration has subsided somewhat and just getting on with other things in the interim.
Hadn't mentioned I've also got sender issues for at least
oil pressure and perhaps
oil temp as these are doing weird things at ignition on and crank and I've found that the water pump has a small persistent leak.
Pump will have to be removed but for now if I get the car going that is a major mental hurdle I'll then be able to put behind me.
I assume a lack of use has seen something perish on the pump, which I thought a bit odd, but again 5 years sitting around doing not much isn't generally good anyway.
As to the heads they copied someone elses set up Don had done so no these are fine can't recall if they were Edelbrock heads but a known option.
It was suggested again that I try aero start or similiar which might be an option but I'd rather leave the uncontrolled confined combustion options till all other ideas are failing. Too much bang isn't good either.