[COPO]

I would suspect it is not an original Bladwin Motion car based on the fact that the car started as a small block. By 1969 the converted cars almost always started life an an L-78. This not only made the 427 swap easy, but also made the economics work as Baldwin Chev. would re-sell the L-78 short block that was removed. Of course you could send Joel Rosen your info along with a check and he will let you know, but at this point it might not be a good gamble, although the pay-off would be a big one if it is legit. Good luck and keep researching.