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LTX and LSXPutting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.
You can disable all the codes in your list. I assume you didn't retain AIR injection (I didn't think LS1's had this) and skip shift.
Would any of these codes put the engine in limp mode? I drove the car for the first time today albeit very easy for about 5 minutes. It was not what I had expected. Seems on-par with my 305 I'm waiting on one part so my a/c is not functioning yet. I'll wait a bit later and give her another go when it cools down here.