Found these on my PC and figured it might help some people in future

Bill Sherwood's awesome site
http://www.billzilla.org/4agmods.htm#115hp

http://www.geocities.com/MotorCity/7...geengines.html

And a "little" about Cams:
http://www.club4ag.com/faq%20and%20t...haft_story.htm

Was a great read for me