Is there a simple/easy way to ID a 273 engine vs 318?

doczapp said
To get more air into engine bay…my dad street raced it so I guess he thought it needs more air

67CBodyGuy said
Is that really the most distinctive difference between the two? (I already know the answer, but I have to ask)

You asked for a quick and easy way to determine if it’s a poly or an LA motor. If you want to know the displacement of the motor, I already posted to look at the front of the motor below the head on the drivers side. It will have a letter year stamp along with the displacement.

If you want more quick and easy clues, after 1965, the intake bolts take a 9/16” wrench, 64/65 and possibly earlier polys use a 1/2” wrench.