Is this ultra rare or what?

[bronze 72 super]

WOW!!! Quit the thread!!! As some guys have stated Chevrolet never made a 4-bolt 327. For examble: Corvettes had a 327 motor rated at 375 horse power with fuel injection, all 2-bolt mains. It would stand to reason if this engine had that much power, wouldn't Chevy had made that a 4-bolt main? Check the crank number on your tear down, that tells a lot on what this motor is. Chevy in the late '60s used the same block for 327 and 350 motor, but different cranks. Like one guy stated why would Chevy make only one 4-bolt main 327? Makes no sense at all. Chevrolet wouldn't "custom" make just one motor!