Hi mikejohn56 . . . the earliest version of the carter YH was for the '53 vette. These are going to pricey because of the application . . . everything vette is pricey. But the YH was also used on Nash and Corvair engines. These will be a bit more economical alternative - but YH carbs are not common so none are cheap. And the trick will be to find three identical carbs. There is an active listing on ebay right now for the Nash variant:
Carter YH and the seller has 4 in hand.
regards,
stock49
