Six Pack question

A Holley 750 that gets 13 mpg around town....should be in a museum in the rare artefacts section, lol.

I would expect a 6 pack to get slightly worse economy, but not by much. Reason being the large variation in runner lengths of a 6 pack compared to a single 4 bbl intake. The mixture has to be rich enough for the leanest cyl to not misfire & that gets harder when there is a large variation in runner length.