I am trying to get start-up and idle as close to stock as possible. I am looking for some pointers or guidance other then whats all over the forums. I have tried almost everything but either it idles good and starts like crap or vice versa. I imagine I am just missing something. If i could get some help I'd be happy to PM whatever you want. I have logs upon logs and tune. Please any help would be appreciated. Both are 6.0's with head work long tube headers and stock bottom ends one with 92mm fast setup and other with 102mm, both have nick williams TB. Also what does B4350 do or reference. Thanks