No A body 8 3/4 came with big bolt pattern from the factory. All small bolt.
As mentioned, the big bolt pattern started in 73, when A body cars used either a 7.25 or 8.25 rear. Both big bolt.
Looks like you have a nice set of 14x5.5 Rallye wheels.
Why not use those ?
Then switch the front brakes to small bolt Kelsey Hayes brakes.
