I have an early 64.5 convertible (Mar 18, 1964) with a 260 V8, automatic, 2V carb. It's #1908 out of Dearborn. Hoping someone can tell me the concours-correct configuration for the intake manifold and carb. Should I have the PCV or downdraft and which carb should I use ... C4ZF-? I believe it should be an Autolite 2100 with 1.01 venturi but I guess that depends in the PCV vs downdraft question. Thanks in advance everyone!