I am very interested in said article. You know someplace that has the old archives available?
I downloaded it from the web and didn't keep track of where I got it from. I suppose you could do a search on McGurk and Hot Rod Magazine.
Buoymaker: Yes the small block was a great improvement over the stovebolt, no arguments there. I had a 56 Bel Air with 265 and powerglide which was a snappy ride if not a powerhouse. Then a little later I had a 57 Bel Air with a power pack 283 and powerglide which is one of those cars I never should have sold. It WAS a powerhouse by the standards of the day. I used to borrow a 57 Vette from a friend to impress my girl sometimes and it wasn't much faster than the Bel Air. Also a 283.
I also wrenched on two nearly identical school buses, same size, one powered by a 283 truck engine and one by a 261 I6. The 261 wasn't much slower but was more pleasant to drive (less shifting) and consistently used less gas. Different driver, of course and also different route. 4-speeds with 2-speed axles in both.