What is the largest wheel's I can put on a 1974 dodge dart 360 sport

Here is a 74 dart sport 360 I had a couple years ago, the wheels are torque thrust D's 15x10, 3-3/4 back spacing with BFG 295-50-15's rear end is 8-1/4. I had 295's on 8in. Weld wheel's before the Torque thrust when I had it, they were really close to the springs.

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