LOL, yea, for the Zr-1 I would stay stock... at most maybe 4.10's
I think the LT4 at 10K is a great value, and cheap and easy HP can be added, but the LT5 is just that special motor....
Or I wait a year when the wife finishes school and I drop the Vette money down toward a GTS, provided they don't skyrocket.
But working for GM I thought maybe a Vette would be nice...