Garry is right, those are Lightfour cylinders on the motor you’re working on.
I dug out some images of a Handifour that I have on my hard drive. You can see the physical differences between Lightfour and Handifour cyclinder castings
Hope it helps.
Best,
PeeEmm TeaTwo
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...