The Marcum family out of Ohio(?) had one in a Dart Sport, then in a Challenger several years ago. The indexes may have ben lowered since then, but not enough to prevent running under if the engine is built well while not resorting to any high-doller "tricks".

I believe the Dart ran in E/CM and the Challenger ran in F/CM.

There may have been one in a '68 Cuda. But I don't believe it's been run for quite a while either.

The engine is a "paper combo" that was drawn up in the infancy of crate motor Stock. This was before Mopar had any big blocks to compete against the Fords and Chevies. It's also been de-factored from the original 410 hp to 405. Double-check with IHRA tech to confirm.

440 crate motor info

As for the heads, the 2.08/1.74 Stage head legality would need to be confirmed with them also. They've been out of production for a long time.