Hi John and welcome!
With removal of rear pegs, you can replace with S-shaped piece of bar-stock.
Don’t drop front end off too much. Aside from running out of suspension-travel, you get diminishing-returns after certain amount. Most racers use 21-25mm of fork-tube showing above top triple-clamp as sweet-spot.
No difference between my original Woodcraft clip-ons vs. generic replacements I got off eBay after crash my 1st season. Any interference problems is an adjustment issue. I prefer my handlebars about same level as seat. To avoid bumping into fairings, just cut off upper section where they bolt onto gas-tank.
You can clip something onto lower triple-clamp stopper to limit steering-lock angle to prevent squashed thumbs. I use small binder-clip with captured bolt; others use wheel-weights.
After tyres, you’ll want to work on suspension:
- stiffer springs and thicker-oil with higher level, use RaceTech’s calculator
- gold-valve emulators to get better damping with adjustability
- rear shock, can use GSX-R shocks with some bushings to fit (no hacking/mutilation of frame needed)