planning a LS3 build
Let me first say I am new to the LS world, that being said I am planning a build of a Ls3 out of a 2012 Grand Sport.
I have the wiring harness and ecu out of the vehicle. I plan to use the computer only for engine control. Would it be better to re-flash the ecu or go with one of the new engine control mod. out there now.
As I have said I an just starting to plan the build. Would like around 550 HP as it will be going into a 1982 vet
Thanks for the help

