67 dart rear leaf springs help

Not a dumb question. Why spend hard earned $s when you don't have to? The 7¼ axle has a 2.75" tube, the others have a 3". If the truck does not match this, the u-bolts, and shock plates will not work. Many recommend that u-bolts not be re-used anyway. Not sure if spring perch on axle is compatible.

Mopar springs a-body springs are 2½" wide and 55" long, 20" front segment. 35" rear segment (same as 62-63 B-body). Compare this with the truck.

Now for my dumb question. Do you want your car to ride like a ...truck... in the rear and a car in front? (Understeer, too)