64-72 Olds 307/330/350/403 V8 Factory Exhaust Manifold pair - Non Emission Style

Description

I am not sure exactly what Model or Year of Oldsmobile engine these exhaust manifolds are correct for.... but they will bolt up to any 307/330/350/403 small block Oldsmobile head.
The threads are good at 3/8-16 on all the threaded holes but one .... per the Oversize tag in the pics.
The Oversize hole is at 7/16-14.
The head mating surface is great so they will not leak if you use good gaskets.
Some surface rust but overall in very good condition.
casting # 380001LH
casting # 398704RH
I do not accept returns so make sure these will work for your application.
You will receive exactly what is in the pics.
Thanks for looking!!!