what is the difference between theese i know for one thing trannys are diff. what about intake, heads block ect.


the other question i had was where do i get a wiring diagram for the factory radio harness schematic?

Check this link for autobahn info:
http://www.howardm.net/dred98/autobahn.php

Try this for radio wiring:
http://www.installdr.com/Harnesses/GM-Wiring.pdf