Some parts should work. Dont take this for gold, but I think exhaust parts should fit, the k engines are the same size so it should mount in the same place. I think the 05 has a different IM so you might need to look for another intake. The internals for the 05 engine should work as most all k20 internals will fit eachother. There were some suspension changes so I would wait on those parts. It all depends on what your looking for, list some parts and we can probably give you a general idea of if they will fit.
www.robearracing.com and
www.showstoppersusa.com have some decent prices on some good parts and both places are fast and have good customer service. Dont ever order from nopi, they are the devil.