1963 valiant front runner sizing suggestions needed

reddog said
I am running 15x6 with 3.5 b/s, 195/60/15 on front with large bolt pattern. 15x8 with 5.5 b/s, 255/60/15 on rear. Rear has offset shackles.
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How much clerance do you have to the spring and to the rear quarter with 5.5 back space? Thanks. Eric