I keep hammering on the same theme: torque is god and torque kills, not
speed.  Lugging a modern engine will queef it out long before running it at redline
will.  Under the same conditions, the components of an engine are more
lightly loaded at high revs than at low speeds.  Although I'm repeating myself, I
have to ask: If you have a pallet of bricks to move by yourself, would you
scurry back and forth carrying them two at a time or would you grab a corner of the
pallet and try to lift it until you pop a hernia?

This is something of which I see little concern by those popping these killer
(how apropos) motors into a V-gone's engine bay.  Just because they fit
doesn't mean they are fitting.

George