71 LS6 carb - wiw
 

Posting for a friend -
"I have 2 new original carbs that have these numbers on them.

39886195 4803-1
one is coded 0594, the other is coded 1634. Is this a date code, and if so were these built in 1974?

From the information I can find, they show up being used on a 1971 454 LS6 425HP with a 4 speed.

Thanks
Dan."

Thanks, Lon

Re: 71 LS6 carb - wiw
 

Built in 1974, 1984, 1994, or 2004.

If they're still in the Holley boxes, there may be some information on the paperwork that might give you a better clue as to when they were manufactured.