1973 convertible 455

[Rohey]

How does one tell which of the 3 versions of the 455 is under the hood?

[Smartin]

Rohey,

Welcome to the board!

There is a 2-letter engine code on the engine block deck in between the #5 and #7 cylinders. There are also a couple other numbers there, too...but we will need those 2 letters to identify the engine type.