Leaf spring recommendations

73 Duster 360, Ford 9 in. 39k miles. Rear Tires 225 60 15 15x8 rims. Qa 1 adjutable shocks all around. Front same tires with 15x7 rims. 5 leafs ea. side Anytime I hit a bump the rear tires hit the body and it makes me nuts. See pics..
What advice can you give? I'm torn between SS 3400 LB Springs (car weighs 3400) or
ESPO 6 leaf. If possible I would like to keep the QA1s. Will they be long enough? Or smaller rear tire? The 1 in ruler is of the pass. side. Also, I tried rolling the inner fenders but dont want damage the paint so I stopped as the inner lip is large. Any recommendations would be appreciated. Thank you

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