It is on the smaller end of the 600-750 range typically used on small blocks, but if it runs good now, i wouldn't be in a great rush to replace it. Considering you have a pretty stout cam & the 3.23's, it actually may be a little crisper in normal driving then a 750ish carb. The only downside would be that you're leaving a few ponies on the table in the higher rpm range, but how often are you really hammering on it?
Oh, and that engine bay looks super. :thumleft:
