From the bits and pieces I see the E10 means regular pickup. For Econoline. The T means that it has a 170 engine. The 221145 says that the truck is a 62. Built in October of 61.
J is the color red.
U I do not know what that means in front of the 90 which is your wheel base.
01 for axle is the gear ratio of 3.50:1
The real serial number is on the brace at the tailights. There should be stamped numbers and letters on one of these braces behind the tailights.