I haven't contributed anything in a while so here ya go. My tank is out of my 62 Dart so I pulled the filler neck out and removed the o-ring. GAS TANK FILLER NECK O-RING / SEAL 2.000" i.d., 2.375"o.d., 3/16" crossection (nominal) (actual - .210") OUTER DIA. OF FILLER NECK IS 2.000" To install: Clean outer surface of filler neck and the groove in the mouth of the gas tank. Insert o-ring into groove in the mouth of the gas tank, rub a scant drop of 3-in-One oil on the inside edge of the o-ring. Push the filler neck down into the mouth of the gas tank, making sure the filler neck is sliding through the middle of the o-ring, not catching on it and pushing the o-ring further inside the tank (this is nearly imposible to do anyway). Then push or pull the filler neck to the best length to install well in the car. Cheers. Paul of Pasadena (the Little Old "put a Dodge in your garage, honey" Lady, lives next door) In a message dated 8/28/07 11:14:35 AM Pacific Daylight Time, 62to65mopar@xxxxxxxxxxx writes: The 1962 and 1963 cars use an 'O' ring that goes on the inside of the filler neck opening of the fuel tank. The original part number for the 'O' ring was 1730087 -- long since an obsolete number. If we can find the specs for that 'O' ring I can post it for a reference for people to use to find in a hardware store a proper size 'O' ring that works in this application. Gary H. Pat Herman wrote: > > I thought the 62's had a grommet "built in" to the tank and the filler > neck slides into it. > > Pat ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.