Question How are hickey fuel tanks mounted?

[J_T]

Hello all, I was changing my body mounts But I found that the hickey fuel tank mounts under the frame into the tub. So therefore I can't raise the rear of the tub to swap the body mounts. I believe this tank has through bolts. Is anyone familiar with The type of hardware that is on the underside of the through bolts? It appears to be a flush mount nut but uses a square head? Either way, mine are rusted on and I thought about just grinding off the heads in the tub and dropping everything down But I wanted to confirm that would actually be enough to drop the tank?

Thank you all!!

[DeadheadNM]

I’m not certain, but maybe these tanks were mounted in a manner similar to the auxiliary pickup tanks with example hardware seen here: https://www.67-72chevytrucks.com/vbo...d.php?t=734283

[J_T]

Here are some pics i finally figured out how to share. It appears these are threaded internally and use a square drive? I tried to spray pb blaster inside which is why they look wet

[1970cstblazer]

That sure does look like how the pickup RPO NL2 auxiliary tank was mounted..

[J_T]

Awesome! Thanks I'll weld some nuts to the bottom and be gentle with it. The square holes were deforming.