I've been following the Nicson and other posts and trying to learn about the GMC Six and add it to my computer and dyno database.
I have a lot of car manuals but very little truck info.
Would anyone be able to post factory torq and power ratings (gross or net or both!) for the GMC sixes
228-236-248-256-270-302?
Any or all would help, searched all over the web and couldnt find this info.
Thanks very much
DeuceCoupe
