I'm not sure what that swap would do to the value of your car, but
I just put at 383 in my '68 Camaro, I can tell you that there are a lot of
hidden
expenses and modifaction you might have to make. These engines run hotter
than a stock v8, so you'll need a big radiator with a good trans. cooler
if you have an automatic. My mechanic also suggested an external oil
cleaner, to keep the engine running at a normal temp. They also produce
a lot of torque, obviously, so you have to reconsider your transmission,
driveshaft, rear end, tires, all drivetrain components.
My 383 is a smooth running engine that really moves when you give it
some gas, but like I said you'll have to think about other modifications.

I suppose the value of the car depends on the type of person buying--
a lot of people might drool over a 383 in a z-28, but like you say, it's no
longer stock.

Let us know what you end up doing--

good luck,

Terry M.

If you want to be safe on all ends, put the original motor and trans
in a safe place along with all of the original smog crap and then do
what you want with the car.  As long as you don't wreck it or
seriously torque the frame/chassis, you or the next owner can bring it
right back to factory specs with the original parts.

                          ...Ron
--
68' Camaro RS
88' Firebird Formula
00' Mustang GT Vert