[HWYSTR455]

PTFB makes a brace that goes between the bar and the frame horns that helps prevent ripping out the bolts, works on both A and F bodies.

http://pro-touringf-body.com/chassis_components.html

If you have it apart, and easy access, it makes sense to install nut-serts. Use only steel ones, and you have to buy the large type insert tools.

Some use a plate with 2 nuts welded to it, slipped into the frame from the front, which is a good option too, but you may have trouble lining it up on install. Once installed, it's good.

.