273, could it be a commando and CAM question?

I agree with that, "Use the cam in there now" statement.

IF the cam is a OE spec'd cam, it is small. And it so appears that is the cam as listed.
IF the cam in there now is the MP Performance replacement cam, then it may be a bit large for the set up, not so much for the engine.

The performance replacement cam is a good bit larger than the OE 340 cam.

IMO, like said above, if it runs fine, leave it alone and enjoy it.