I believe the front hoop is technically the loop of roll cage that goes from the driver's left side floorboard, up the left A-pilar, across the top of the windshield, down the right A-pilar and down to the right floowboard. The dash bar simply connects to the front hoop. My interpretation is that the dash bar IS NOT part of the front hoop.
The diagrams in the GCR on pages 150 and 151 sort of illustrate this though it would be nice if the GCR's glossary contained a precise definition.
As with any technical advise you receive from non-official sources like me, I always suggest that you seek the official word by contacting Sven Pruit at the National office at 1-800-770-2055.
R.E. Alabama Region
SEDiv AS Camaro #61