The article was in Popular Hot Rodding or Hot Rod, but it was a few years back.
They built two engines, using same brand parts from the ground up. Same brand/model/profile of cam, carb, intake, header, piston ect.
The 360 made more HP and Tq. And, they admitted they were very surprised, building the 360 had come out cheaper. I thought it was interesting, because even I, as a Mopar fan, thought building the 360 would be more expensive. I always assumed building the 350 would be cheaper, because for better or worse, they are a dime a dozen. As part of the article, they tracked the bill for each motor.
They did not dress them up; that is where the 350(or any SBC) is cheap. There's tons of chrome and billet ect for SBC's.
I would have liked to see that buildup done with a 340... I think the power differences would have been much greater.
It was an interesting article. I had the mag, but it is long gone now. I think it was 5-7 years ago.