I got a doozy here
I have a 73 swinger with the original 4" bolt pattern on the rear and an upgraded disk brake 4.5" bolt pattern on the front.
I want to put some nice wheels on it but the bolt pattern is screwing with me.
I bought some adapters for the rear wheels that change the bolt pattern to a 4.5", but they also add about an inch and a half to the hub.
Any ideas would be appreciated

You could redrill the rear axle flange and drum, for the 4 1/2 pattern, or you could change the complete rear for the rear from a factory disc brake "A" body car. These had the larger bolt pattern. It is NOT possible to swap large bolt pattern axles, into a SBP axle housing.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Change the complete axle housing, the larger 10" drum brakes are worth it & will balance the disks better.

Having 2 different sized spares stinks (been there, done that) , & wheel adapters in general are pretty scary.

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63 Valiant Wagon
225 - 4 bbl