600 CFM 4-Barrel Carburettor Mechanical Secondaries. Manual Choke. 4150 Series

Model 4150 with shiny finish
Chevrolet small block 2 x 4, 671 blower calibration
Designed for use with superchargers
Mechanical progressive linkage
Dual 50cc accelerator pumps
Manual choke
Boost referenced power valve
Throttle lever cut off for clearance on a sideways application