The Same, but Different

The motors will interchange in the frames.  But that's pretty much where it ends . . . and I don't mean just performance wise.  I mean the actual engine parts will NOT interchange.  The pipes are different, the crank is different, the cams are different and the intake manifold is different.  The pushrods are different.  The cylinders are different.  The rods are different.  The cam and crank bearings are different.  The spark plugs are different.  The top motor mount is different.  The pushrod clips are different.  The gear cover is different.  The breather is different.  The engine sprocket and primary chain is different.  The pistons are the same !  When you talk to the "race guys" that know these motors, if you really want to ruffle their feathers, and get their dander flingin' . . . tell them "Oh heck, all they are is a K Model with different heads."
Zing !