Ideally for the line of sight, in regards to stock design, the stock will need to be designed for either open sights or scope use. A compromise will detract from the optimal use of either design. An example would be using a low comb for open sights and a higher comb for a good cheek weld with a scope. You can't have both, one or the other.
Modern adjustable combs can provide versatility, but that's not applicable for your build. Good luck.