Either inlet is fine for 300bhp+, with good mapping 270-280bhp is possible although your engine being low comp it may be a little less
Cant remember what dark greens flow for but if it isnt enough then loose them and buy some 630cc Siemens Deka IV's they are a modern injector with a better spray pattern and are high impedance (longer life, less electrical noise) and about half the price of the greens!!