Help finding a 1 barrel carb, or converting to super 6

Hey y’all, I got a 69 cuda with a slant six, and my trusted mechanic said the carb is bad. He said the air jet hole is too big from excessive corrosion. It’s a the holly 1920.

Would a Carter BBS be a direct replacement? I’ve found this one that says it’s for a ‘66 Rebuilt Carter BBS 1-Barrel Carburetor 1961-1966 Dodge Slant Six 225 6-Cylinder | eBay

Or, I’ve got an intake and exhaust manifold for a super six conversion - but none of the other parts - anyone know where I could get the rest of the parts?

I’m not experienced with car mechanics- but am learning.