I apologize for the late text. I believe I posted an Email and a phone number as well, if you were interested. Please explain why you think it's not a GS 455? Just curious. ( it has the 455 /convertible frame with the extra body mount)
"...The Vin is 434371H. Probably should have included that here on V8 Buick..." You are correct; My bad, had '70 stuck in my head, but it was a '71. '71 VIN for GS350 and GS455 was the same...