(65 Barracuda)What is the largest 15" rear tire I can run without tubs/rubbing?

Have you moved leaf springs inboard? I want to run same size tyre but think I need 3.5bs to fit with factory spring location
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nice looking fish !

NOT A 65-6 , and don`t know about their wheel wells. I just yesterday put 295 60 d15 hoosier quicktimes on my 68 fastback/full 10" tread , 28 3/4'' "supposed to be 29" tall , 15x8'on weld prostars. Have plenty of room heigth wise, will need an additional 1/16" spacer on the drivers side to go with the .550 spacer that's on it .
3" studs, offset rear spring hangars, front of fender well recurved to match front of wheel house, before paint job, looks stock.
Biggest thing I can get on it w/o tubbing !! Just took 296 60 15 drag radials off-------which are for sale in tire section.