I'm pretty new to this but I may have the possibility of getting a used 5.7 LS1 pretty cheap out of a GTO. I'm pretty sure that putting it in the car will be pretty easy but as far as the ECU... that's where I have my doubts. Would I have to change it out? or just like flash mine?
On the side note I would be upgrading from the v6 engine. Any thoughts or help would be greatly appreciated.