fuel tank to filler tube grommet

[sigmfsk]

TK got us started here:
www.bluesmobiles.proboards.com/index.cgi?action=gotopost&board=parts&thread=755&post=4871

I believe this is a summary of what the parts catalog calls for:

74 non-SW: 2880481
74 SW: 3404182

75 non-sw: 3402182
75 SW: 4002010

76-77 all: 4002010

Here are some pics:
2880481:

from
www.rtspecialties.net/proddetail.asp?prod=2880481

3404182

from
www.ebay.com/itm/NOS-MOPAR-1966-75-DOD-PLY-GTX-CUDA-GAS-TANK-FILLER-SEAL-/130691164954?hash=item1e6dcceb1a&item=130691164954

4002010

from
www.bradsnosmopar.com/nosmo76funef.html

I'm guessing that they're not all interchangeable. It would be strange that they'd callout different SW / non-SW grommets if there wasn't something different with the tank. It looks like they finally made up their mind in 1976 when all the tanks used the same grommet.

Here's some info from the parts catalogs: