If you want to use factory exhaust manifold for dual exhaust, the passenger side 1956 or 57 Lincoln manifold will fit.. For the driver side you will need a 1955 Lincoln manifold

Just a thought, but can't you use an exhaust manifold gasket as a template?

Hi at all, my name is Thorsten, I´m from Germany and I´m rebuilding a 1954 Lincoln Capri 4door sedan.
I want to know if someone of you is having a dxf file for the Lincoln exhaust flanges. I want to build a new exhaust system,
without the crossover pipe ;-)