If all you want to replace are the head gaskets, autozone sells them for the 3.0 only at $95.00 ea.
I purchased the set from shonut for the 3.2 swap and almost all the the gaskets I needed for the top engine (a better deal even at $300.00).
All my old gaskets and seals were hard, dried or cracked. If you are going to replace the head gaskets your self, might as well do all the gaskets for the parts you have to remove...(valve covers, o rings, injectors, water pump, manifold, front crank, etc.)
If you are going 90 percent of the distance, take the extra step it takes to complete it 100 percent.
It is not difficult to do. You will have to remove many parts. Photograph, before and after. Store all bolts and brackets that go together in a platic bag or box an lable them. Lable all electrical connections and hoses you separate, and clean everything well before you put it back.
If you organize yourself, you can do it. You can do a better job than the dealer or a regular mechanic who is only interested in doing minimal effort. This is your car, if you plan to keep it for a while, it will serve you as well as you service it.
Good luck.
Jose
