[ChevyRacefan]

2) pieces of 2"x10"x1/4" plate.
3)1/2 threaded rod 2)10" long (cut from one piece) 1)6" long
6)thick washers
6)nuts.
1) rag if you are worried about scratching the spring.

step 1
drill holes in the plate for the threaded rod to go through, just outside the spring coil( both sides of spring)

step 2, drill holes in the plate so the 3rd rod is in the spring center , this is so if the tool slips on the coil it can't go anywhere.

step 2a
glue rag on plate that will contact the spring if scratching spring is an issue
Step 3
on threaded rod nut, washer, plate, plate ,washer, nut on the rods for the outer holes in plate.

step 4, Put on spring and put 3rd rod in the center hole with washers and nuts, like the outer 2 inside the center of the spring.

step5. screw the nuts down the threaded rod evenly on either side, and the center.

step 6
put spring in frame and a arm, connect ball joints, back off nuts on threaded rod.

simple, reusable , cheap, and it works .

note 3rd rod is for safety, nothing more.