The small block version was actually a 292/508. The big block version was 292/509.
My understanding is that they were designed to work with stock shaft rocker arms. That explains why they were long on duration, somewhat short on lift.

I ran one for years in my 493. I had almost 11 to 1 squeeze and 3.91 gears and a 27.5 inch tire. It actually was a decent performer with decent manners. I'd guess with only 383-440 cubes it would have idled rougher. Less gear or less converter stall would have resulted in slower low speed performance. Without looking, I'd guess that the DC or MP book would suggest Higher than stock compression and lower gears.

I had a 292/508 in my Frankenduster. That 360 had around 9/0 CR and stock rebuilt heads. The car felt much slower out of the hole. I had 3.55 gears and a 4 speed in the car. I should have went with a smaller cam since the stock heads and lower compression were not a good match.
Live and learn, right?