A couple of magazines did tests with one of the 360/360hp Commando crate engines in a 3,400lb Duster. I believe Hot Rod had a shootout between that and Chevy & Ford crate engines. I think the Mopar ran low 12's in the shootout and Dick Landy got it into the high 11's afterwards with some more tuning. But that, like other crate engines, was not OEM available thus not a "smogger".

The 300hp version can't be considered a "smogger" for the same reasons. The only difference between the two was the intake manifold, .010" of cam lift and intake valve size.

I have the 300hp version, but blueprinted to IHRA specs with a single plane intake, I've been 11.31 so far. My engine builder has been high 10's in a lighter car.

But "stock smogger 360" can be defined a lot of ways. OEM looses a lot of compression because pistons were way down in the hole and car versions were dished. With or without smog equipment installed? Later years got worse.