I am a small cylinder head machine shop and i have a set of 452 casting cylinder heads. They are fresh and havent been ran since the they were rebuilt. I am selling becouse a customer had me do the work and buy the parts and never paid his bill. They have been cleaned,magnafluxed, new 5 angle valve jobs, valves reground with the intakes recieving a 30 degree back cut, bowls blended and intake and exhaust gasket matched.I also machined the seal bosses for a .531 positive seal and so you can run a double or even a triple spring. They are assembled with new comp .575 lift springs and new comp steel retainers and locks. I flowed the heads before and after the work and they were at 200 cfm before and now around 245.I am asking 850.00 just to cover my expenses, and if someone wants them i will pay the shipping anywhere in the US. If interested please feel free to call at 256-328-0830.