[19Fordy]

V8 makes a good point. When I replaced my perch bolts and axle I did as pictured below. However, if you can relieve the pressure on the perch bolts with the wishbone in the car it would be nice. The C-clamps in the photos were used as a safety precaution in case something "sprung loose".
Spring spreader is homemade and much stronger than needed. Last photo shows reverse eye spring where I also double nutted the perch bolt so I could use it to jack up the car without damaging the perch bolt threads. Just seemed like a good idea.