LT4 Question
There's no reason to do this swap, and the parts are no longer available through GM anyway.
Send your current heads to be ported and pick a cam that matches your application. You'll be much happier and faster.
$1100 gets you polished heads and a cam that's good for 370 rwhp. You'll need the supporting bolt ons he mentions however.
Lloyd Elliot is THE man to go to for head polishing needs in the LT1 world.

