Rear Disk brake brackets/baskets

[Steve68]

Here we go again.... I'm soon to be assembling the rear in the 68, I bought some rear disk brackets and they fit either 4 gen baskets or C5 baskets, does anybody have a measurement of the bolt holes for the caliper basket on a 4 gen or C5, I don't remember which I'm supposed to use, any help will be appreciated, thanks Steve