Forgive my questions as I didn't digest all of the replies below but would it more of a PnP (plug n play) by purchasing pre-made hard lines from the dealer online? I use Claremont Toyota for a substantially reduced price and free shipping. See if it's worth your time before going the custom DIY route.

it's been a while since I removed the fuel tank but do the fuel tank strap bolts screw into captive nuts on the chassis? Of course, one would need to soak these hardware in PB Blaster or similar and pray that the bolts will come lose. Is there space above the captive nuts to introduce hardware store nuts should the captive nuts don't want to release the hold on the bolts? Again, apologies for not remembering if there are any wiggle room in that area.

I've had couple of instances where the captive nuts were corroded and I removed them then replaced them with regular nuts. But, I had the room to make this happen, which isn't always the case.

How to knock out captive nuts - simply use a hammer and a dull punch to knock them out. They have tiny amount of welds so they're easily knocked out of their perches.

HTH.