273 4-bbl Hi-PO Engine Appraisel?

Suregrip391 - The only way you can know for sure if that's a Commando motor is to pull off a head and see if you have the dome top top pistons or not. Sounds like a regular 273 to me, with a commando intake, carb and air cleaner. Not hard to build. I have the same 1969 setup in my '65 Barracuda and it's not a commando motor, but nobody would ever know unless they pull a head or check the date. There's nothing stamped on mine either.