On my '73 340 I went with a 650 cfm Edelbrock AVS carb on the Edelbrock stock replacement intake. I am returning mine to original configuration (removed a medium rise Edelbrock with a 750 Holley) although the AVS was only correct for a '70. Both available through your local NAPA at better...
This may seem obvious but where does the heater control vacuum source make the connection on the engine? My 73 'cuda, now in restoration, came from California and the vacuum hose no longer comes through the firewall. Thanks
Steve