Unleaded head

They seen you coming a mile away !!
just go for a std head recon with bronze guides and recut seats, should get atleast 100k out of it. Remember leaded fuel dried up in '86/'87 and a lot of heads are still in use without converting over. The only thing i've heard is a minor amount of 'squeeking' from valves but very rare.
I ran a 2.0 head for 5yrs in std form and the person before me had not reco'd it ever, when i pulled it down to for an inspection it only had usual wear n tear from 200,000km and never used upper cyl lube either!!