That looks like a fun ride. I've been doing something similar with a 250 Nighthawk for a while now, it's been a slow moving project but mine will be more of a backroad fun machine than a looker.
Honestly for the tracker look I like the Rebel frame much more than the NH frame which has no cradle under the engine at all. Are you planning a skid plate?
92 CB250 Nighthawk - partsbike
93 CB250 Nighthawk - partsbike
92 CB250 Nighthawk - project
78 CB400T - partsbike
81 CM400C - Project, on the road
73 CB750K3 - Long term project