It depends on how skilled you are. If my 603 needed a head gasket I would do it, actually at least to me it doesn't look like to bad of a job. The exhuast manifold would probably be the worst part.

So I guess the queston is how much wrenching time do you have? Do you have the space and tools for such a job? Have you ever pulled a head gasket before on another car?

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200