Fiberglass bodies

What was done in my case, is a 'leg' was added to tie the roll bar to the frame on the rails. There is also a wide leg that sits on a plate on the bottom of the tub. Seems strong enough to me, but then, I'm not 'off roading' the jeep. I'm using it for a farm truck and to plow snow (if I ever the the clutch sorted out.....) Good luck with the bondo!

Tom in Frankenmuth