400 ex hot cams and valve clearance PLEASSE HELP

[greenhead_hunte]

i recently bought a 400 ex that had an extra motor that is tore up, but it has a big bore kit, hot cam, and all the valves reworked, and im wanting to put the head and the hotcam (stage 1) On the stock motor with a stock piston, will the valves have enough clearance to not hit the piston cause I dont know whats been done to the valves????

[sc400ex_rider]

there should be no clearance issue with a stg 1 and stock piston. maybe if the head was milled .080 or something