Hey thanks. I'm going to order the kit that's the same for the current Edelbrock 500 cfm 
My primary carb is in the rear. Aparently, the carbs I have were made to run together. The rear carb  has a choke and the normal vac ports. The front carb  does not have a choke or any vac ports.
I'm currently building the fuel lines for it now. I'm going to use AGS NiCopp 3/8 line plumbed into a Canton Racing fuel filter [pic above]. I'm going to braze 2 edelbrock banjo fittings to the Nicopp line [limited clearance - see pic]
I just got my progressive linkage sorted out. Check out my return springs and mounts.
I installed 2 s/s studs with spring pulls from McMaster-Carr