Choke thermostat help needed

Hi all, I recently picked up a "new" exhaust manifold for my '65 because mine is cracked. From what I understand, the choke thermostat is different between the years. My car has the factory Holley 1bbl on it, and I am hoping someone has done this before... Is there a choke thermostat that I can rig up to work between the old Holley carburetor and the newer exhaust manifold?

Thanks!!