My 67 ss427 is a US built car and the frame is slightly different at the front where the sway bar bushing retainers bolt on compared to my CDN cars. It doesn't affect anything, no one would even notice really. Could be a AO smith, Budd frame difference as they both built the frames.
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1967 2dr Biscayne. L36, M40, G80, K05, F41. #'s. 1967 Impala convert. 283, glide. Parked in the garage since 74 and hasn't moved. Soon to be BB 4speed.
Certainly you would think the interchangability would be 100% since they are both B body Chevy. I can imagine that for a Canadian Pontiac maybe a change, but on a Chevy, it would seem odd. As Andrew states, cosmetically there sure could be changes though.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
'64 Canadian B-body Chevy/Pontiac X-frames are actually better than '64 American B-body Chevy X-frames. American lowrider fans are all wound-up for Canadian frames because they are boxed better.
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Prince Edward Island
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.