Chrysler Part # Interchange

Good Afternoon All

Working on the '64 Dart (225/6 2 1bbls) and have a question:
The '64 Parts book gives the Part# of 2299245 for the main jet.
Would the last two digits (45) happen to be the jet size that is stamped on the jet?

The intake is an Offenhauser piece. The instructions state to drop two jet sizes. The problem is that I'm not sure the carbs that I'm using (Holley 4712) have the original jets in them.

Thanks to All who respond.

'64 Dart:coffee2: