You mentioned a desire for touring. If your '78 is not so equiped, you will probably want to add fairing, saddlebags, trunk, etc. Let me advise you to not put much money into it. There are many people that prefer a "naked" bike, and strip off the add-ons. There is not much market for those parts (certainly not here in East Tennessee). They often go to dumpsters. Also, any stock parts that you remove should be saved in dry storage as they are becoming rare. I'd love to find a rear grab-bar for less than $50!
"Love 'em all.... let God sort 'em out!"
2006 GL1800 - the Black Pearl
1979 GL1000 project - to be restored
1978 GL1000 with '75 engine - the Hunley
Ex '79 CB750F rat bike - the Rocket - SOLD!
Ex '86 SEi
Ex '77 GL1000
Ex '75 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped