Well the thing is that they are an auto recycler that has multiple of both engines. And the one they say will work costs more. They didn’t say anything about the computer though. Just that i would have to use teh same manifold i think it was if i swapped the engine. Is there any way to find out if it would work without actually putting it in and trying it. From what i can tell mine is a series 3 not a series 2. The reason i don’t want to keep looking is they are mostly more expensive. The one i found is $450 for an engine with 20000 miles on it. They say it would work with a 2006 grand prix. Same body style and all the other replacement parts i have gotten are interchangable between the 2 years but not interchangable with the engines they say i would use. Is there anything that i can look for on my car or on the other engine that would tell me for sure if it would work?