I think your rad support fix will hold up just fine; I was merely mentioning it for when you go for a full repair.

I reused flywheel bolts on my first clutch change out of necessity; it was never an issue. But if I'm already ordering a bunch of stuff from RTM, $25 to avoid having to drop my tranny again is a pittance

Since your stuff is already ordered, I think you'll be fine with the old ones. And loctite