There are hours of aimless surfing at this link.
http://www.gmheritagecenter.com/gm-h...tion-kits.html
A collection of Chevy product info can be found here - a collection of Engineering specs, AMA/MVMA specs and the dealer order guide. A great info source!
Free downloads can be had by clicking on the word "show" next to one of the Chevy nameplates.
Please Note: while engine specs including original HP ratings can be viewed in the link above, this post in no way is intended to instigate or provoke commentary on the fairness or accuracy of HP ratings - old or new. That said, please refrain from hi-jacking this and turning it into another New-Car bashing thread.