Plymouth duster rear suspension questions

What kind of clearance do you have to the springs?

Those 295’s on my car are on an 8-1/4 rearend with the 3” spring relocation. A previous owner put the 3” kit on but thankfully did not minitub because it’s a fold down seat car.
I have the Doctor Diff .5” relocation kit on hand so it is on the to-do list. The main reason for the reversal from how it is now is so that the Accurate Ltd. exhaust pipes can route in the proper location and the factory exhaust tips will be in the right spot. Impossible with the 3” kit because the spring gets moved to right beside the fuel tank.
I am close to confident that a 275 would be worry free but I would have to be cautious with the 295 unless the test drives pan out. Currently , I can fit my fingers between the wheel housing and tire on the inside. On the wheel opening it is trimmed well and would need a pretty solid jounce for the 295 and metal to contact each other.