That depends on how much money you want to spend , one you want a good job and going to change the engine one day or you want a great job and keep it like that forever, one when this engine was made they had lead in the fuel and the valve seats were ok , now with the unleaded fuel of today I see a lot of older cars having valve problems , new cars have hardened seats , some shops can do it , others will just cut them and grind the valve and take your money and send you on your way , but if you want to spend a few bucks for being done right your in luck, only you have to contact Burton Power in England for a head or head work, they still made this engine way pasts the 90s in cars in Europe , and used unleaded gas , so the right valves and seats in place and maybe a few up grades also , also EFI , look up Dutch wagon on this site , hope this helps