I would think discs from a 69 or 70 impala would work,71 and up might work but they have a bigger bolt pattern for the rims. They might be hard to find but there are companies that make disc conversions but they are pricey. Jeff
Pontiacs had the big lug bolt pattern back then, so Impala rotors wouldn't work, and I'm fairly certain the suspensions are not the same. You'll probably need to use '70 full-sized Pontiac stuff, although the years immediately prior might also work. '69 was the first year for the single-piston calipers, which seem to be a lot less troublesome than the old 4-piston ones.
Full-sized Chevys went to the big bolt pattern in '71, when all the big cars got the same new suspension design.
I thought the canadian pontiacs were built on the chevy chassis,they were in the 50s and 60s. Jeff
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