you dont have to take off the manifold or nething? that sounds simple. also i was looking at this site for build up kits for the tranny, i was lookin at the 379 dollar one, what do you guys think??

http://www.kdsperformance.com/4l60e4.html if i put shift kit, trans cooler, deep pan and this kit you think i could get a good amount of miles on it before id need a rebuild say like 20k miles?

 

what do yall think about that

 

do any of these kits offer enought strength to handle that hp? like 415 rwhp