I have a 69 Cutlass S that i want to put an old school set of aluminum mags. I found a local person that has a set that is currently on a 77 Monte Carlo. I am curious if anyone knows if they will match my 69 cutlass

 

Should be the same as 5 on 4.75" pattern

 

Yes, the 5 x 4.75" bolt pattern was used on A/G body cars from 1964 to 1988. Keep in mind that bolt pattern is only one element of fitting, however. Offset and tire size will also matter.