Scotty - I know little about the drb but there are probably more of them then any other make in OZ (??) and they seem to go pretty good at the nationals. They have an unusual shape though and not as pretty as most in my opinion. All cobras used to look the same to me before I saw a of different ones and became more aware of what looks right.
I would say more cobras do not have PS then those that do. A few guys who have changed to PS on the classic revival reckons it has made a huge improvement and CR now recommend using PS on their new chassis, which apparantly has more cabin space then the older model Im still building.
Im sure some others can chime in with more info.
Cheers