Is the backspacing on large bolt pattern rallye wheels the same as small bolt pattern rallye wheels? That was my concern. I don't know if small bolt pattern rallye wheels used with drum brakes are the same backspacing as large bolt pattern rallye wheels used with disc brakes.
All I know is I put a 3/4" spacer between the wheel and the hub and my tires were very close to the wheel well lip. I decided to hold off until I could just do it all at once, which will be after my Charger is complete and I have more cash available.