i own two 6.2's... looking at getting a 6.5 in a suburban... seeing the 6.5 is basically a bored out 6.2 with a turbo (many swap in 6.5 upgraded parts &seals on 6.2's) you may find the CUCV forum at steelsoldiers.com a good site as well... the cucv techmanuals are great for working on 1980's gm trucks as well. oh and i really like the haynes diesel engine manual.... its got good stuff on 6.2's and 6.5's