[Davidf]

Rebuild the carb. Good place for a kit is Quadrajetparts.com. Flooding can be caused by needle valve not seating or well plugs leaking. 1705xxxxx carbs usually don’t have the leaking well plug problem. Quadrajet are super simple and easy to rebuild. Choke/pull down are most fiddle bits. Probably should pull the idle tubes before cleaning. If you careful, you can get out originals and still be able to reuse.

Edit: Just noticed, you have a 1708 carb which is post 1976, so probably the well plugs are not the cause for flooding