Need Help w/ Intake Details for '67 920 Heads on '66 273
the 920 heads have the "standard" 3/8'-16 intake bolt thread and angle.
The 2465315 heads are the ones with the special 5/16" threads.
The best intake for that would be the Edelbrock LD4B if you can find a good used one. If not, go with a Wiand Stealth for a street motor with a square bore carb...
https://www.holley.com/products/intakes/dual_plane_manifolds/parts/8022