the seller is legitimate, i've bouoght stuff from him on ebay before. just
remember with these new heads you are going to want to change the exhaust
valves for oem valves because the spanish ones have problems. the newer
castings are better. if you have the money i'd go with the new ones. but, if
you use a GOOD original core and rebuild it PROPERLY you wont have any
trouble. be careful of rebuilders that mill the sealing surface. this
affects the amount of crush you get on the rubber gasket. the more you mill
the less crush there is and the more chance for future leaks. theres a spec
for mounting everything up without gaskets and measuring the gap but i'm not
at my shop.