Does anyone know of a equivalent modern part that interchanges with the '71 B-body? I gotta think there were some pickups or Jeeps that used something similar that the local store would sell. TIA

OK, I had a 71 & 73, but never changed the tank on either. A quick search shows 68-74 j-bolts for $18/pair & those look like the ones on my 70. Is there something strange I'm missing?

I guess you could always get some 5/6" or 1/4" hardware store bolts about 6" long, stick them in a vise and bend a 90-degree end near the head and use a hardware store nut. That would work too.

classic industries may have em

4002006 mopar part number

Well they are easy to find online but that doesn't help me this weekend. Looks like I will be reusing the old ones. Thanks!

Sure thing, no problem. I'd suggest you wire brush the heck out of the threads, or better yet, run a die all the way up the threads before installation. It's always awkward putting a tank up, so anything you can do to make it easier is a good idea. I've even put a piece of plywood on a jack to hold the tank up while I start the nuts on the j-bolts.

Napa use to carry them, may try your local Napa first before using the old ones.

rockauto is lot cheaper for the j-bolts..

I believe the nuts should be pre-started on the J beforehand. The design is a variant of a "drop-and-go", a common method used in manufacturing facilities.

Start the threads of the J-hook with it installed on the strap. Hook the straps into the chassis, hold the tank up and simply hook the hooks. Then tighten.

i agree with goody. that's why there are so many threads showing after the install is complete.