I am in a similar pickle as a lot of these folks here that @subford has really seemed to help. I have a 1981 bronco custom 351W, C6, 4x4, and I am building it from a heap of trouble. I replaced the engine years ago and life happened it got put aside. I am now back in it and trying to build it right and stock (California smog). trouble is this guy could be a 7200VV carb or 2150, it IS an EEC NOT MCU. engine harness is hacked and unfortunately the old engine and calibration code sticker are long gone. I want to see if there is a way to figure out the original code. The found in truck ECA is: E0AE-12A650-A1A and calibrator: E1VF-12A649-L1B, VIN:1FMEU15G8BLA35534. Does this help? is there anything here or more I can provide? I have a massive amount of factory manuals training guides and engine/emissions facts book. all these sources just get me close but not exact I feel like I am working in theory here. Thank You so much in advance.

 

It definitely would have had a VV carb if it's a California emissions 1981 Bronco
EEC 1 ,2 or 3
That 81 was EEC 3 IIRR
You had to suck the Bmap sensor down to 15 or 17 inches of vacuum to initiate the self test
I was just a fledgling at the time, but I remember the guys bitching that they could not achieve that much vacuum (at out altitude) with a new mighty vac hand held vacuum pump
Tried it myself years later on a few old Lincolns
We used to just overhaul the VV's and replace the failed diaphragm and screw the self test
Your calibration sticker was in at least two places, the door jamb and the valve cover. Both stickers should be gone by now