Not sure if its allowed to post pics on someone's tech thread, if this is a violation, I apologize. Since the thread was started, didn't see a point in starting a new one. Like Unforgiven said, more than one way to skin a cat, might as well keep all the pelts here.
Basically, to change out the EEC, I just access from the top:
My truck is an '87, and has an MAF adapter, but the principle is the same. In the first pic, the vacuum canister is attached (silver drum looking thing on the right hand side, lower right corner of the pic). There are just two bolts there, also 10mm IIRC, but if they aren't, just use the proper size socket. (disregard the wiring/hose mess..I only posted these pics because they were handy, and I happened to be in this forum for something else and saw the heading, checked out the thread, agreed with Unforgiven, and went back to my thread and grabbed these quicklike...yada yada yada...)
Once that is out of your way, access to the front of the EEC is painless.
Then you remove the driverside kick panel from in the cab, and pull the EEC out from inside.
*EDIT* Bossind...did you also write down which model of computer you have? You may also need that information for certain things. That number is on the plastic pin connector housing. This one is a C3W1: