Order in a few sets and send back the ones you don’t like. Lol!
I’ve have a few engines that the heads were mid match. Possibly from warranty or what ever. Ran fine and no issues.
I’ve got a set in my heads from a built 340 I bought - 2.02/1.60 that are ported and the guy went to aluminum heads I bought for $500. Mis matched.
I should had looked at the numbers but got caught up in the heads being already ported. Sorry I do not have the head numbers in front of me but my machine shop told me they are good to go and not worry about it since they were ported identical.