I bought a set of bare ported and polished heads, and ended up buying 11 used valves off another guy (the guy was missing one), so I also bought 1 new valve. When I get my heads machined, cleaned up and put together, will the shop automatically seat each valve properly? Or will I have to pay extra to get that done? They quoted me $320 per head to get them bolt-on ready. I'm just not sure if any extra service will be recommended or required for the used valves. Thanks.