After looking at you picture I think if you tell them the intake is for a early to mid 1960's chevy with front oil fill you can get a good performing manifold from just about anywhere. You can use the same rear compressor adapter that is on your car. It uses the intake bolts over the 2-4 intake runner and the bolt tab for the forward compressor mount uses the alternator/generator tab. You may have to check at swap meets but there are plenty of early stock intakes [4bbl] out there.