yeah I think 86 and 87 are one year only PCMs figured they were different before looking them up seeing as how My current 86 prom is only a 3 letter code VS 4 digits for the 87 and newer
I read a few thread over on Third gen.org and several folks did the swap and said their stuff ran better, another thing that I need to check on, is I dont think Im feeling the converter lock, I tested the lock up solenoid before I reinstalled it it worked fine, so I suspect this ECM might have a problem. I havent tried to pull codes on it mainly cause I have been busy getting it road worthy. new front brake hoses, New pad, swapped out the airplane gears for normal street car gears, stuff like that, im currently installed a set of factory rally gauges and will have the Tach hooked up tomorrow and I can see if the RPMs are dropping.