I've done searches all over the net and everybody talks about the
added power but no one is specific about exactly how much gain is
possible. Being that these things can cost over $500 I'm not sure it's
worth the bucks... can anyone vouch for how much power can be had
from these things to justify their cost (and labor, since I'd have to
port for the 58mm on the LT1)?
PS: While we're on the topic, how about the throttle body coolant
bypass mod? Anybody vouch for this one?