Car has 155k miles.

I will be pulling everything. Got quoted $650 to refurb the head by the guy that the dealership contracts out headwork to - he's done a cosworth head before.

worst case, guides are about $18 and exhaust valves are about $90... so if i've burned a few this will likely run me 1k-1.2k with gaskets and all the other crap that goes along with it, "while i'm there" like the water pump. I already have a bag of brand new, OE timing components so I'll just do that while it's apart.