Judging from the pix posted to this topic, showing an uninstalled roll bar kit, an installed bar, and lastly the so called "spoons" to install the bar to the axle/wishbone bolt, leads me to believe that the installation is "iffy", at it's best..
Anyone that has ever taken the front wishbone loose from the axle knows that the large convex shaped nut fits very securely into the concave socket of the wishbone...
Trying to attach the "spoon" into this tight fitting space, without modification to same, appears to me to be near impossible, no matter how much "lock-tite" you use..
I think I would choose another means to attach the lower link to the axle.. I know that in years past, like fifty plus, we welded a 1/4" tab to the lower portion of the axle, attaching the lower roll bar link to the tab..
Ford attached their roll bar to the shackle mounts via a U shaped bracket.. Of course to do this the shocks have to be connected to the original mounts, generally the top of the axle bolt, on the '35-41 Fords, not the shackle/spring bolts as shown in the pix..
For my money I would be suspect of the "spoon" axle bolt type of mount... The roll bar is a form of a torsion bar, therefore it is going to be subject to a lot of stress to control body roll.. I don't think the "spoon" would be strong enough for that stress, especially if the attachment nut is barely secured to the axle bolt...
It should be noted that Fords method of attaching the front roll bar to the shackle mounts actually had an added feature of acting as a "roll-bar" and a "sway-bar" i,e, a direct connection, chassis/body to suspension... No flexible links..