So, it's a 16 gallon midship tank???
Because I've not known a difference in 19 gallon aft tanks, except for the odd extra deep Bronco tank.
(Because Broncos carry their spare on the swing-away)
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.