Doug,
I know the Cleveland heads don't have a hemispherical chamber. The BBC Chevy heads have similar arangement as the Cleveland.
In years past to mount the Cleveland heads on the Windsor you had to drill coolant passge holes in the heads using head and intake gaskets as templates to match the block and and intake. Steam holes too if I recall. Also had to plug one or two that didn't match or weren't necessary. Now you can buy them already set.
In a recent magazine, don't recall which one, they did a dyno test of the Clevor vs 4V and 2V Cleveland heads. I believe they had a 302, or somewhat larger, built for the test. The 2V heads worked the best for the combination they had set up.
Now I have to find the article to get my facts straight.
Bob