Edelbrock part #7164 Performer RPM Q-Jet intake manifold is designed for street 396-502 c.i.d. Chevy V8's with large oval-port (1975 and earlier) heads. This intake manifold is designed works with spread-bore carbs, but also works with Edelbrock square-bore carbs without adapter. No provisions for hot air style chokes. Accepts divorced choke, late-model waterneck, air-conditioning, alternator and HEI equipment.