Twin Sucker seems unable to see others may want something different than he does.
Sending the top end off to Gorr will result in a nice rideable albeit fast motorcycle. However do not skip suspension set up. As power levels go up it tends to magnify suspension shortcomings. At the least springs to suit weight/use if not mods like the aforementioned cartridge emulators. I have them in my 465 and big improvement. In fact the 43MM forks are from an '82 490.
Enjoy and post up the results.
A lie has no feet......it can't stand alone.............