Hmm RE the handbrake cable not being long enough that isnt what I was told (albeit not on a mx6, v6 323 astina, but they are about the same size). That person could be wrong, shouldnt be too hard to make it up though, im not up for sacrficing my handbrake.
The 323 is a different chassis. Similar to the GE/GF and BJ but almost nothing swaps between them. Not a lot is done with rear brakes specificaly and I dont own one but I believe all the B chassis cars pre BJ use different bolt spacing.