[tntnt44]

Hi I have just bought I 63 ford truck and it has a Motorcraft Holley carb
it looks to be big enough for a 428, it is running a 390 now, but it seems a little big for it to me, I cant seem to find any info on this carb but numbers are close to 428 mustang carbs, any info you can give me the tag on the top of carb has C9AFUA4E6 and motorcraft on it. then on the choke area it has C9AF-8510-U List 4809 and under list is 451 thank you Gil

[Veronica]

Hello. I think that if you'll look at that carb a little more closely you will see that the numbers on it are C9AF-9510-U and the list number is 4609. That is the 735 cfm carb for a 428 SCJ with an automatic transmission. Hope that helps.

[tntnt44]

thanks My eyes are not to good will give it A look, that would be why its running fat if is 735 cfm thanks Gil