RPM vs. stock Manifold

Looking for your input on using an Edelbrock RPM (not the air gap) versus the stock 1969 340 4 barrel manifol on my soon to be built 69 340. I have both manifolds. The engine will be used in a 4 speed Dart with 3.23 to 3.55 gears and near stock engine. I plan to clean up the ports a little (stage 1), put a close to stock Hughes hydraulic cam (either the 215/223 or 219/228) and near stock 10.5 compression. I will use the hi performance exhaust manifolds and 2.5 inch TTI exhaust. Carb will be the stock carter 625 cfm unit.

Which would you run?