Wiring is very straight forward, if you used a sierra body loom then it should be more or less plug and play.
You will have no issues with imobalisers unless you get a ECU/Loom from a Bugeye Scorpio.
There are 2 types of 12V
The <91 with solid cam flowers and runs with air flow meters.
The >91 with hydraulic folowers and runs a MAP sensor and Lambda.
Either engine will work with either management.
TT
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