Congrats Dan'l. Beautiful but not rowdy enough. And I can live with your ride height but can still get a sheet of paper on top of the tires.
Leave the short shifter; use more muscle (you'll get into a rhythm with the controls with familiarity). Longer-neck shifters look goofy.
Before you try Marvel, get temps up one day and then 3 shifts to 6200. If they are sticking, they won't be after that.
Keep posting. Hate to lose your dedicated and meticulous work.
Just so you know, your coated pipes and mufflers are blasted, your vinyl bulkhead has already started to sun-fade and there are stone chips at the wheel lips and hips...
ENJOY.
PS-Your wife is not laughing; those are sobs - seeing her retirement travel money putting around the neighborhood.
