15x28x10.50 Mt sportsman pro's

hiya folks ,

i bought new centerlines with 15x8 with a 4 7/8s offset.and the mt sportsman pro tires as mentioned above.

my springs are relocated with the mopar kit in my 74 big block dart. back space is no problem.

now for my question..... how in the heck are you guys fitting these rim/tire combination under these cars without having to cut up the quarter panels?
as it stands i would barely have 1/4 of an inch of quarter panel lip left after i cut the crap outta them to fit the wheel. i havent ran into and forward clearance problems it looks like it will work. i mean i cant rol the inner lip enough to get the clearance. i think i may end up with about 1/4th of an inch of clearance if i chop them up.. but i hate to do this to a new quarter panel.

any suggestions on rim offsets available so i can get these nice tires under the car? could i drop down to like a 7 inch wheel and it wouldnt ball the tire up?
lol !!!! i have even thought of sending my axles back to moser and having them recut and narrowing my housing an inch but i would like to be ready for opening day at the track. and i think cash would prevent me from this at this time. thanks

- pete