CASE relearn...
 

ok, my question is do i need it? this is really the first time i ever heard of it, haha.

my 01 SS got a motor swap almost 3 years ago and has seen about 7k miles since.

what do i do?

I had to get it done to get rid of the check engine light to pass inspection. I think HP Tuners can do it. I had a local garage do it with their SnapOn thingamajob. It doesn't affect the way it runs or drives so it isn't needed in that respect, but to get rid of the SES light it's needed. It might be something that can be tuned out as well.