I'm leaving stock class and headed for quicker and faster with my '65 Chev Nova wagon. By Spring, the particulars will be: .040 over 230 inliner; Schneider hydraulic cam .510 lift and I-224 and E-230 duration @ .050; lump-port head with 1.94 and 1.60 valves, mild porting, performance VJ, screw-in studs, about 11:1 compression, stiff springs and light retainers; Landon headers; 4:11 posi rear end with 24" tires; Powerglide with shift kit and 3,000 rpm stall converter. Car weighs 3,059 without the driver. Power band should be between 3000 and 6000 rpms. Here are my questions: I was given an Offy 4-barrel manifold and a Holley 390 cfm carb. The manifold doesn’t have an adapter and I have to buy one. Should the adapter be open center or 4-hole? Should I use a spacer? Should the spacer be open center or 4-hole? Or, will it even matter? The Offy manifold before the adapter is 4-hole. Thanks for your help.
