To carbking, I'm putting a Stromberg carb BXVD-3 marking on base to a 26 Buick intake manifold which I have turned upside down to use the down-draft carb. A fellow in Austrilia has used a Stromberg carb with a BXV-3 marked on base. I need a 1 1/4" opening at base of carb. I beleive the BXV-3 has a 1 1/4" opening while my BXVD-3 has a 1 1/2" opening. I can make an adapter but can I use the other base on my carb? Thanks for any info. Steve