273/318 Small Port Intake (Trade For Crosswind)

Edelbrock performer and Weiand stealth (a copy of the Edelbrock LD4B) have smaller 318 size ports,
performer RPM , LD340, and most others, have the larger 340 360 size ports

the old SP-2P intake was a small port economy/fuel mileage, intake, they have tiny runners and do not flow above 4000 RPM, good for torque on 4X4 trucks