STR 12 Edelbrock Crossram

I have one on my Duster, they work well althourgh the moden Air Gap will yeld better performance.
Linkage's on mine are not the oridginal ones & the second carb is only opening half way, been looking at after market ones to fix the problem.
As there is not many if at all here in Oz the general comment when I open the bonnet at any show is " arr big block " then they say " small block who makes these & how do I get one? ".