Pre purchase opinion on these tire and wheels used please

Off the hip, the rears will not fit if you have an A-Body 8-3/4 converted to BBP with B/C/E drums. I don't know if they will fit if you have drilled A-Body axles and drums. On my car with an A body 8-3/4 converted with BBP axles for B/C/E drums I run a 17x8 with 5.25" on backspace (19mm offset) and a 245/45/17 and its close enough to the inner fender lip to need it rolled and about 1/2 from the leaf spring in the stock location.

Front could work but will probably be flush with the outside of your fender. The later disc spindle widens the front track about 3/8" per side. With an A-Body spindle on my car I run a 17x7 with a 4.75" back space (19mm offset) and it tucks in and doesn't rub. Could probably go to a 4.5" back space if 7" wide.

Below is my car with the sited wheels installed.

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