Thanks mate.I have just had the tank and pump and rear fuel lines out and cleaned or replaced them all.There was some crap in the tank and pump which I pulled out.The filter I run is a Moroso unit with a removeable S/S element inside.The element looked clean today when I pulled it out except for some fine grit.Once cleaned the pressure went from 3psi to 9psi.Carby's are a bit more forgiving of grit than fuel injectors so I may try a different element that flows a bit more.Also I am looking at the new Holley mechanical pump that flows nearly as much as the Holley black pump I run now as the electric pump has been a bit troublesome.
Iv'e had a look at the Superoo tanks and they look good and for $750 they are competative with making an ally tank.
I think this winter I will have to make a decision and get some maintenance done.The car has been running as is for about 4 years now so it is due.