[Scrappy]

Since the head heights are set evenly so the cam tower will bolt flat and seal, you could feasibly do one head if the height is not screwed with. Cheap way out, but could work.

I had to replace one so I took three to the machine shop ... 2 off the same bank and the new used one. They matched the used one to the others. This was on a 3.0L.

The gasket kit is about $270 (?) to do the heads. If you want to rering all the pistons the gaskets are already paid for.