I bought this to use to run in my 440 mopar lump but plans have changed so its surplus to requirements now. it was taken off of a healthy running 460ci ford it was replaced by injection (only did a few thousand miles). it is the mechanical choke version
details below as stated on the edelbrock website
EDELBROCK PERFORMER SERIES 750 CFM, MANUAL CHOKE CARBURETOR
CALIBRATED FOR PERFORMANCE
Designed and calibrated for optimum street performance in small-block and big-block engines with Performer RPM, RPM Air-Gap and Torker II manifolds and with Performer manifolds on large cubic-inch engines. Includes both timed and full vacuum ports for ignition advance. Electric choke #1478 can be added if needed. Comes with: Metering Jets - Primary .113, Secondary .107; Metering Rods - .071 x .047; Step-Up Spring - orange (5" Hg). Use our Carb Stud Kits #8008 or #8024 if needed, see Installation Items. For auto trans throttle lever adapters and more, see Tuning Accessories.