Slant 6 1bbl

I'd love to have a brand new carter b&b single barrel exact replacement for my original. I loved it and I got 26/27 miles a gallon with it. It had zero pick up lol but who cares . My 2bbl set up has some much more power and top speed and pick up all around but gas millage is 10-12 now and the adapter / no air cleaner is a problem . And rusty now need to be rude. I've done and so a lot of custom things with cars and motorcycles . But yeah I want a bolt on carb that works basically out of the box call me crazy lol. I mean that's what 90% of us do when doing 4bbl stuff because it's so universal fitment . But these single barrels are a pain because there all different.