You kinda lost me here. There has to be some clearance between wishbone bottom and lower plate otherwise the perch bolt has nowhere to go. Bolting it down all the way would be the same as bolting the perch bolt on with the nut spun all the way up and tightened. If you're patient and let the perch bolt/axle/bones soak in penetrant overnight - or two - and add torque to the four bolts the tool acts like a puller. Most times, you'll find the four bolts are looser in the morning than they were the night before due to the steady pressure applied. Heat helps - when necessary - and the hammer helps, but if you get too carried away with the hammer you'll peel the threads off the perch bolt. Big trick is simply being patient.
I made a similar tool to C-9's suggested tool above and it actually worked very well along with some paitience. I tried everything else and this worked good. I got those pigs out after being there for 70 years and I can re-use them. So THANKS C-9
The Jalopy Journal
