I just picked up a dual carb intake for my Chevy 250. It came with 2 Rochester 1 barrel carbs. They need to be rebuilt. I don't know the year of them. Their is supposed to be a ID tag on them but they are long gone. Can anyone tell me what year they are? Here are some pics. Thanks, Todd

Their are 2 different numbers that I found.

4525 is stamped right where the baseplate meets the intake

57 is stamped where the baseplate meets the carb body.

Thanks again!!

http://www.jalopyjournal.com/forum/attachment.php?attachmentid=972607&d=1273523626

http://www.jalopyjournal.com/forum/attachment.php?attachmentid=972608&d=1273523626

Look like manual choke one on a 57-62 truck. Take a Neihoff CK-157 kit.

Also, If it helps I measured the throttle bore. It is 1-17/32"