From what I have heard, the 8.8 is just about a bolt up. As for the tranny, a stronger valve body (shift kit) or researching the J-mod, but the J-mod/Jerry-mod requires drilling into your valve body's seperator plate so if you don't want to be enlarging the holes, worried you might mess something up, shift kits do work.
http://www.tccoa.com/articles/tranny/
they have some articles that involve transmissions and has the J-mod howto, plus they have one thing about shift kits. Only problem I have found with that J-mod howto is I couldn't find the 99+ 4R70W automatic specs for enlarging holes.
http://www.tccoa.com/articles/tranny/
they have some articles that involve transmissions and has the J-mod howto, plus they have one thing about shift kits. Only problem I have found with that J-mod howto is I couldn't find the 99+ 4R70W automatic specs for enlarging holes.