Just a forewarning... when I built my 402, I had 2.25 valves and they would not fit in the piston valve reliefs. I bought TRW's and they were the same, so I sent them back. Check you're piston to valve clearance. None of the piston manufacterers cut their valve reliefs big enough for 2.25 valves, only 2.19 or smaller. The only way you are going to make those heads work is if you have JE custom make you a set. It will cost around $900. Been there done that.