Hi guys, I have a customer that wants the widest tires (like Drag Radials) and 8"- 10" wide 15" rims to go under a STOCK 68 Dart with 8.75. He does NOT want to mini tub or relocate the springs,but does plan to put SS springs on later he said. The car is not here to get measurements. You guys are always helpful and very knowledgeable, Greatly appreciate any info with tire sizes and offset/ backspace. Thanks in advance