Go for it ! I think fork boots are cool anyway. BTW on exhausts just to share my experience. V65 & V50 III exhausts can be switched BUT there can be a few minor challenges (different ones depending which way you go).
If (as you did I think) you fit full V65 exhaust on V50 engine then the downpipes will hang lower because the V65 exhausts are slightly higher to compensate for the extra head height & you may have to fiddle around to get the silencers fitted on the rear of the frame. Clearance on cornering might be tighter too.
If (as I did !) you stick a V65 engine (you have to keep V50 gearbox& clutch) in the V50 III frame but keep the V50 exhausts then you get the opposite problem & the pipes sit tight under the engine & frame making it tricky to fit properly, harder to drain the gearbox as the cross pipe is in the way, and the gear shift & brake foot lever are always tight to the pipes.
