Oh no they most definitely will. The leverage those things have over that hinge setup is insane.
Valvetrain on the RB to rev 9-10K isn’t hard at all. Common practice on these things in europe and austrailia. Guys are spinning 9K on stock motors. Only issue they’re having are OE and N1 oil pump rotor failures, or stripped gen one(r32) oil pump drive snouts. We’re going a bit beyond those pieces.
Stroker 2.8 can be made to spin that fast too, just going to cost an easy 6-7K more.