If memory serves the Cardiac was one of his earliest boats, when it was just Scadden and not North Fork and before he started cutting corners. It probably has a nice aluminum breakdown frame, quality oar locks, and might even have tubes made by Aire. I think that boat had long, small diameter tubes. It's probably a pretty solid boat. The breakdown metal oars are probably the weak point.
That said, I always thought it was stupid (or maybe even negligent) that he claimed his boats were "rated" for a certain class of whitewater, implying that something was safe to use up to that class. When we all know it really comes down to the skill level of the person using it. Personally, I've floated boats like that one on Pumphouse, Roaring fork, Green, North Platte, etc. It will be perfectly fine for the stuff around here when used with good judgement.
I agree the more recent stuff got much more questionable with the quality, materials, goofy oar locks, etc. but back in the day those boats were pretty nice. I think this model might have been from that era.