Holley carb ID

you're correct the 4010 is the model number. but the 0614 is the date code.

and its a 600 cfm..

the r84010-2 means that:
"r8" - rebuilt carb
"4010" - model number
"-2" is the submodel


thanks guys for the help!

Where did you get any info that indicates that?

I have an R80496 and it's NOT rebuilt. It's a list number 80496 carb.

The 84010 is the part/list number of the carb and it's coincidental that the 4010 also matches your model style. The next on the list is also a 4010 model, yet has 84011 which is a 750 cfm. The breakdown you posted can't be correct.