Nice bike to modify... a good, solid standard, with lots of parts available!

One thing about moving the foot controls... you need to be careful about the pivot point. Simply elongating the shift lever (for example) can result in the throw getting way off, and making it hard to shift. So, for example, if you have to tap it 1" up to shift now, if you elongate the shifter that can quickly become a 3" lift to shift, resulting in poor shift performance, and having to take your foot off the peg just to lift up far enough to shift.

If you move the pivot point, then you need a bracket, because you can't just drill a new mount point into the engine casing. And the bracket is going to push the shifter out away from the bike a bit, and even 1/2" difference can make the footing and control very different.

Not to discourage you at all! But just make sure to keep all the parts you remove, and prototype the replacement and how well it works, before cutting anything down or making other irreparable changes.

(On this era Honda, one of the great things to do is take off the side covers, remove the airbox, and put air filters directly on the back of the carbs. This opens up the space under the seat, and lets the frame breathe... makes the bike looked stripped down, and sleeker!)