416 Riby on a Montana 1999 Project

I had been planning on building a 416 Riby on a Montana 1999 PH action I had in the shop. Don't need 2 416 Rigby's. So I have a new Montana PG action with rigby size bolt face, a PTG 416 Rigby finish reamer, and a oversize english walnut stock that the action has been rough fit into.