New member and Cadillac owner. Last one I had was a 1958 62 Series, with a 365 cid. Anyways. I have a 2005 STS with a 3.6 . Car is immaculate with no issues what so ever. However I have never been able to leave well enough alone. Can anyone tell me if there is a way or if it is even possible to do either a LS swap or SBC swap into these platform vehicles? I have both and would like to use them in something with a little luxary.