Holley 94 carb

[sotto71]

Bought a Holley 94 2 barrel carb from Mac bids for $50, didnÂ’t really need it at the time but it was new no gas smell,seems legit,getting around to using it now and IÂ’m confused with the jets that are in it ,they are marked 350 ? IÂ’m googling the crap out of this and seems they are metric 1.617mm which would be equivalent to a .063, IÂ’m using it on a 49 ford flathead head which would originally have .051 jets,my research show IÂ’d need a 230 jet 1.311mm to equal.051 jet, this is confusing to me IÂ’ve never experienced metric jets in any Holley is this why it was on Mac bids😂havenÂ’t dug deep into the thread size on it yet but could it be metric also? If itÂ’s a standard 1/4”-20 I should be able to just put a .051 in itÂ’s place