Seat option

[onequickchevy]

I am wondering how difficult is is to place a late model GM seat with integrated belts in my 63. Do I have to seriously modify the brackets, build my own or what. I have seen several on here, but not alot of detail other than after the fact photos. I currently have no belts at all, and it's not safe cruising with the kids you know? Any help or tip to the right thread would be appreciated. Currently I have the original seat in fair condition, so the floor is not hacked or drilled to death. Thanks!