OK, so you need to replace the cylinder head gaskets - it happens; every gasket needs replacing time to time.
Here's another reason why you shouldn't be upset about it. (you caught it in time before it became a major issue, hopefully)
In fact, You should be excited to get the opportunity to check your intake and exhaust ports, and to possibly clean them up, and enhance the Groove's effect.
(Thanks to Tragy G for turning me on to this YouTube channel...this old school stuff still applies today)