Slant 6 offi 4 barrel intake

Looks like your car now has a 2bbl manifold with a Progressive carb. I like those Progressive carbs, use them on our VW 1835 cc Dune Buggies. Good response with a secondary.

The 4bbl Offenhauser manifold and adapter could be adapted back to fit your Progressive carb with this 2 to 4bbl adapter. Or 4 to 2 bbl . . .

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Available at Advance Auto Parts for 20.00 bucks, the old Carquest stores.