Click on your own username, then click account settings, change avatar.
If you read the FAQ you will see the pixel size (X by X) is limited, and this is
MUCH easier to crop on desktop than on a phone.
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.