I know where there is an OEM early 273 cast iron 4bbl... but it's on the motor and the guy won't part it nor will he ship. If he sold the intake, exhaust manifolds, valve covers , etc he'd actually get more than the ask for the motor. I'm tempted to go get it...like I need another motor laying around.
I know where there are 2. One on a running engine and one on the shelf. Sorry I won't sell. LOL Oh and a LD4B, a aluminum 273 prototype and a 64-5 dual quad (Edelbrock)