Holley 750 (vacuum) or 650 double pumper or Thermoquad?

Everybody has their own likes and dislikes.I would go for the thermoquad if it is in good shape.Make sure the bowl isnt cracked.Brass floats-in my opinion,are a must.Kit and floats will set you back 40.00.They can be onery to dial in on your engine,but they are very consistant