Well I have a record of 11 BB chassis numbers when I started the register some years ago. 2 have the S in the number indicating factory built, the rest have a K for kit built i.e. BBMS/FWMC. Unless these chassis numbers were made up at the time which I assume not this indicates two factory built I have found so far. These are all so called original cars, there are several other cars with chassis numbers indicating they are converted from X flow/K series cars.
I also looked at the dark metallic one at Caterham some years ago and it was owned by Simon Summerville(Ming on here) and then sold to Rod Hudson. The first owner of that car was Steve Frost.
The gearboxes can break....so can K series engines, I have had one go in the 13,000 miles I have driven mine, and have been to Le Mans 3 times. The cost of repairing a Blackbird compared to an R400/R500 is peanuts in comparison. Nova Racing do a gearbox replacement set which is supposed to be much more robust and should I have any problems in future I will fit one of these, although Ebay engines still come up that can just be shoved in without any modification.
Anyway, lets get this post back on track and leave Pete to sell his lovely car. If anyone wants to talk to me about owning a BEC then please blatmail me. Whoever ends up owning this car will experience a Caterham like no other.
Nick