My '96 Savage "REX" has the following mod's...
-perf carb; 38mm Edelbrock Quicksilver at the moment but it changes frequently as I play and test; K&N or similar filter
-stage 2 Performance Camshaft
-97mm overbore, silicone carbide treatment to cyl walls for friction/heat reduction & 10X cyl life
-forged 10.5:1 CR 97mm piston with thermal/friction reduction treatments to the crown and skirts
-intake and exhaust ports .... messaged well
-slavy cam chain tensioner mod
-converted to chain drive for gearing choices
-Veypor perf guage/dyno
-top frame tube mod'd to accept different tank
-mag wheels form 80's GS 450/550/650; 16" rear/19" front with tubless Metzler 880's
-front forks from 80's GS550/650
I do not remember exactly which parts were from whic model except for the forks/dual calipers, I know they are from the GS650.
The photo of REX in the "Rubber sidedown" section show dual disc but just one caliper...but I have another set of tubes with dual calipers and they will go on shortly.
-steel trailer fender on rear and a front fender from a clearance sale of HD parts
there are also forward controls from some European company I think...got them on ebay a while back
Performance carb and cam info can be seen @
http://stores.ebay.com/SAVAGE-PERFORMANCE?_rdc=1