Head thread

Im building a new 318 for my rod and im gona bye some heads from a company here in Sweden but they are made in china they are eddy copys ish im ordering emty heads and bying valves and springs from known brand made in usa got a friend whid a head shop and he is gona do the work whid 5 angle seats and so on im doing the porting my self just to up the flow numbers any sugestions on valves at an ok price ps this is a Street engine nothing elseScreenshot_20211005-175845.png