Replacement Fuel Tank Question

Just finished my 67' barracuda with the spectra tank and 5/16 sending unit. Was easy and the guys on here gave great advise. I had the same problem with the locking ring so "SAVE THE OLD ONE" The one that comes with the tank does not press tight enough against the sending unit and rubber gasket to get a good seal. However, using the old one is a bit of a challenge to get on because its almost a little too tight. I used permatex motor seal ultimate gray gasket maker on both sides of seal just in case. Its says its resistant to gas...time will tell. I will post some pics in my tread when i get some time. Over all I am happy with the install and prices of the spectra tank and unit. Good Luck.

http://www.forabodiesonly.com/mopar/showthread.php?t=281276