The big port GS1100G head and cylinders bolted onto a GS1000 will make one hell of a screamer...as if the GS1000 isn't already that bone stock!
Good luck on moving this stuff to fund your projects. Have you tried selling the GS stuff on the GS Resources?
'77 Suzuki GS750B 920cc's 4-1, 3.50&2.50 Sun rims, Ninja/CBR900RR/GS1150ES brakes, GS1100E alloy swing arm, emulators/spring mods/Tarozzi, Fox Factory Shox, kickstart-only
'74 Rickman Montesa VR250
'99 Kaw KDX220 rugged terrain 2-stoke ripper
'77 Rickman CR900 ex-racer project: GS1000-1105cc, Yoshimura Isle of Man cams, ported head, Yoshi Series 1 exhaust, 89 GSXR1100K forks/brakes, Fox Factory Shox, 4.25&2.50 Akront TR rims, 310mm brakes
'79 GS425 racer project 489cc 10.5:1 in GS850 sleeves, megacycle cams, GS500 forks, cbr900rr 310mm brake, 3.50&2.50 DID rims, Dresda style swingarm, Fox Factory Shox, kicker-only
'77 GS550B gs650 top end, Wiseco 740cc, CBR900RR/Ninja 310mm front disc, Fox Street Shox, Excel rims