BBD Blues

My recent experience is the 2280 with mechanical and vacuum power valves are superior to the BBD. The BBD is a light casting, the top warps over time.

The 2280 takes some on vehicle adjustments of power valve and accelerator pump linkages based on curb idle setting. Also idle mixture is important.

The Thermoquad may be the best with the modern fuels due to better thermal control.
Offy is good, especially for your application. May have to adapt bore for TQ. 83 may have mismatch at top of intake to head runners.

Research rebuild instructions from service manuals and other sources. By quality rebuild kits, take your time, and use attention to details.