ok guys just got my new magnums in they are 15x10 with 7" back spacing will have hoosier 275 drag radials on them. i am new to F bodies and starting to see they really need 7.5 BS sooo before i mount these are they going to fit or rub 1/4 lip? magnums only available in inch increments no 1/2" sizes . car is stock rearend etc