Chrysler used two types of crossbars. One straight. One zig-zag or offset. Depended upon the orientation of the hold-down J-studs to each other. Obvioiusly, with the studs right across from each other, that would be the "straight bar" type. If the holes for the studs were offset, the "zig-zap" crossbar was used. Both styles are in repro, if that matters in your case.
VERY nice car!
CBODY67