Jim,
The size of the "allen" wrench we use on the 5/8 socket head cap screw for the rear lower control arm is 1/2 inch. Maybe you should check your size again. I don't think a 7/16 "allen" wrench will work.
We use "allen" head bolts because they give better clearance around the gas tank.
Please let me know if you have any problems.
David
