Exh manifolds in an Early A...

Yes the 340 driver is actually 2 1/4". The 60s 340 passenger is 2 1/4". The Jeep magnum is 2 1/8". The 70s 340 passenger is 1 7/8". The 273/318 are 1 5/8"....I've never had a 273 manifold so it could be smaller than 1 5/8"????.