Just trying to figure a simple way to improve power on the 3.4 crate engine.
Are the intake bolt patterns different from the 3.4 to 2.8?
What are the camshaft specs for the 3.4 crate?
Will those aftermarket 2.8 cams fit in the 3.4 crate?
Does anyone make aftermarket headers for the 2.8 or 3.4?

 

Yes.
Search a few days ago for my 2.8 - 3.4 Long Block Swap Boogie.
IT's supposed to be "ELSE WHERE" by now?
I'd really strongly suggest you run the 3.4 as is.
Designed by GM engineers, it is the best of the best.
For a MEASLY $6!, go to ANY GM dealer and ask for a copy of the GM Performance Parts Book.
MANY of your questions, answered with real facts & Pics.
Very worth while obtaining.
Promise!
Faster?
Hop up air inlet.
Hop up Exhaust
Hop up ignition-new timing chain!
Add gearing
Add nitrous
Simple
This applies to ANY MOTOR!, as long as foundation motor is strong.