what if you weld it there?? in other word bolt it weld it and put extra support??
please don't weld a tow hook as its made from cast steel or dropped forged ( not 100% sure but it doesn't matter which one )and they don't to kindly to a home welder tiring to save a dollar.and you are in deep doggie poo when you have to replace it. Tow hooks are supplied new with rated hi-tensile bolts just for you to use.
With all the messing around its far easier to mount the hook/s to the chassis . Most surfs have the mounting holes already. I have put a 5mm plate inside the chassis rail and bolted up through this and the chassis. By removing the tow bar increases the departure angle and I'm not too keen about towing a trailer around the bush thru mud holes.
TWL have tow hooks on special for about $15 + GST comes with spring clip and BOLTS /nuts etc. or Ill sell them to ya at $20.+