Take a pass on the 1 bbl carbs. Yes, mixing and matching will lead to tuning issues. If you are determined to run two 1 bbl carbs, read the article by K. Patrick Smith on the subject. Pat was Dyson Racing’s long time crew chief, now retired, one of the best mechanical minds I know, former president of inliners international, and ran a pretty fast GMC race car A number of years ago. It’s a lot of work to get them to run right.
https://www.inliners.org/tech/tech4.htmlOn the other hand, and as an alternative, get a pair of adapters from tom Langdon over at stovebolt and install a pair of 1974 ford pinto Holley/Weber carbs. They are a progressive two bbl, small primaries and larger secondaries, threaded input for the fuel lines. They run really well right out of the box.
Tom Langdon sells a carter/Weber carb that can also be used and will also run way better Right out of the box then the two 1 bbls.
