I've been attempting to re-install the fuel tank on my 67 Barracuda and it's proven to be quite the C-Sucker. I've got a new donut on there and I've given it a little lube. I struggled from below trying to push the tank on with the filler neck removed and flopping around. The closest I ever got to getting the neck in the hole it started to roll the lip of the donut. I've now got the interior half apart thinking I could mount the tank and stab the neck in from above but that's not working either. I'm about to re-mount the filler neck and attempt to stab it from below again. Are these things always such a pain to reinstall? What has worked for you in the past?