I believe that, Don. In the late 50's I took a 59a engine out of my '37 coupe and installed a '54 y-block. The fellow I bought the '37 from said the 59A had a 3/4 cam and lightened flywheel. I was a teen-ager and, of course, not very smart. I didn't have access to a dyno, but I couldn't feel any improvement over the flathead.
PS: I traded the '37 to a buddy for a '40 convertible. His Dad said it was the only deal he had seen where we both got beat. The buddy put a Edsel E-400 in the '37 and it would fly.