widest rim on 73 scamp front and rear

I went with a 18"X8" front with 5 3/8" back spacing, and 18"X9.5" rear with 6 1/4" back spacing with a 3/4" inboard spring relocation kit.
Tires are 225/45-18 and 265/35-18. very tight fit but it works.
Thanks, is tight in front by the frame side or fender side? im more worried about the front i think my backspacing will be around 4.5 and i will run 225 60's. Thanks again