Congratulations on the 67II!
To get started, nearly any developer will do what you need - D-76 or T-Max developer from Kodak, or one of the Ilford formulas - depending on your volumes etc, whatever is easiest.
Once past the start, there are so many flavors and favorites, seems like nearly everybody has theirs
Myself, at this point I've settled on good old D-76 as I got some for $2 per gallon. Once that runs out, maybe I'll try something else, but really I don't see much need.
If you have a specific look you're after, you might get some specific recommendations.