Advice on frame damage 72 c10

[Mike_The_Grad]

Hey everyone, I was involved in an accident last Friday in my 72 c10 daily driver. Low speed impact to the car in front of me. Wasn't my fault but that's besides the point. I only have basic minimum insurance coverage so the repair to my truck is on my dime and time. I've already acquired most of the parts I need to reassemble my truck thanks to our members here. (Really do love this site and it's members.)

I've already disassembled the front end of the truck to assess the damage to the frame. The drivers side frame horn forward of the power steering gearbox and outer bumper brace attaching point on the frame rail is no longer straight and has a slight twist. Also passengerside frame rail forward of the radiator support frame crossbrace is pulled over to drivers side slightly. My truck has been in 2 pervious front end collisions. Both resulting in similar damage but to the opposite side. Both times I bent it back into reasonable shape to allow fitment of front end sheet metal and bumper. It's not perfect but good enough not to be blatantly obvious when looked at.

Anyways, my question is, the damage to the frame is really close to the steering gearbox where it mounts to the frame. I've already ground and chiseled out the rivets for the radiator support mounting frame horn. I'm not sure if that needs replacement yet, I haven't put a square on it but I can source one later if necessary. Should I remove the steering gearbox to straighten the frame? Should I fabricate a thick steel plate that I can drill and tap or bolt to the frame in place of the gearbox to avoid having its mounting bolt holes go out of alignment?

I have a bunch of metal stock at my disposal. Plate steel from 1/4" all the way to 3/4"thick. I have solid stock, round stock, square stock, square tubing, steel pipe, thick walled box and rectangular tubing. Literally thousands of grade 8 bolts in any size up to 3/4" diameter. I have oxygen acetylene setup with torch, rose bud, and welding tips, I have a 10 ton portopower with a bunch of attachments. I have come alongs, chain and cable. I got big ol wrenches, etc.
What I don't have is a big tree, reinforced concrete wall, heavy equipment or trailer. within reach or that I own. And I'm a renter here so I don't believe I can start breaking up and reinforcing the concrete driveway or setting anchors or anything like that. I'll post pictures of whatever helps.

I'm about to go grab my tape measure and square with my service and assembly manuals to figure out how bad it really is, so that information will follow along shortly. Thanks for you time and input.