Holley 750 Vacuum Secondary

Holley 80508-7 750 cfm, vacuum secondary , electric choke.

This carb was pulled a few years ago and drained properly. Ran good.
Average price new is 477.00
https://www.holley.com/products/fuel_systems/carburetors/street/parts/0-80508S

Asking 250.00 shipped in the lower 48.

Should be able to bolt on and tune for your altitude.