My machinist here in L.A.   has informed me that while the castings are
decent, the valves are crap on the Spanish AMC waterboxer cylinder
heads.......he said that the keeper grooves are not hardened and you will
have valve problems in a relatively short time......He likes the new German
ones, but reccomends the used German ones, and he actually likes using the
German heads to rebuild if they are in a rebuildable condition.........

prices------

$60 for valve job
$60 for surfacing
$32 install all new 1.9L valve guides
$28 to install new exhaust guides
$30 to weld faces

total $210 for the pair.....of course if there are cracks to weld the price
goes up.....but the absolute max is $450 for the pair

By the way I found new lifters for $7......probably AMC too!

Malibu tony