with a GT2871R on my sierra 4wd...
what chip must i use ? (custom made ??? or one for a T34 , T4 ??)
is it (road) drivable on 350hp (lag etc.)
my goal is 400/450hp , but 1st i need a stronger gearbox , long studded block etc.
some hints and experiences maybe ?

i have green injectors , 3bar map sensor , -31 and a -34 actuator and a custom made 3" exhaust and probably an RS500 ic

p.s. : do i need a 044 pump then ? (ore something better maybe ?)