I've had excellent performance from an Edelbrock 600 on my 302, as has "Fast Eddie" Wilson on his 292. Both engines have had some head work and use RV-type cam grinds, he uses an Offy intake and mine is a Clifford, both with heat. The Edelbrock is a
very tunable carb and is real close right out of the box for street use. The tech line guys at Edelbrock actually speak inline six performance, too. One change in step-up springs and metering rods took 5 minutes and about $15 to get my carb running crisp and stumble-free. It's been trouble-free for years, gets decent gas mileage, and you can definitely feel those secondaries open up.