Another D/Dart 275/273 question???

Back in early 1966,

Chrysler Performance played with several camshafts for the D-Dart combination,
one was the Iskendarian "Isky 505-C", which was a bit more radical than the Camcraft D-Dart camshaft.

Isky #505-C............... .505/.505 - 320* Duration with 108* Overlap
Camcraft #D-Dart........ .495/.505 - 284* Duration with 60* Overlap
Racer Brown #ST-12.... .480/.480 - 294* Duration with 76* Overlap

The Isky unit could pull 7000 RPM's without a problem.