I'm almost positive on the D-Dart being equipped with the Hurst
Comp/Plus shifter. I have to check. But the 1966 D-Dart in the
Car Craft article from May 1966 shows the 4-speed with a Hurst unit.
Yes, the "Inland" shifter was standard equipment for the 66' thru 68'
Mopars. But the D-Dart??
Whats bizarre, is that the Hurst shifter was standard-equipment for the
1965 Mopars. Chrysler, go figure

.
I don't think the D-Dart in the Car Craft article was modified, other than
14" x 6" Cragars, 7" inch slicks and a performance tune-up.
On the Holley carburetor. I'm pretty sure the (jets) were changed (sized up, richer mixture) at the factory, and something else???
I know the Marine engine guys used to put a screw in the throttle
control, to make the #4160 carb a mechanical secondary, but that
wouldn't be legal for NHRA stock class. The guys at "Camcraft"
had the right combo for the carburetor and camshaft on the 273 Marine
engines. Cruising Chessapeke Bay.

PC