hey gisle,
which electric parts do you use, the e23 or from an other car?
i planed the same engine swap for my e24, i know the technical thing is not the probelem, but the electrical system.
i have the hole wires from an e38, but i see the problem in the brake system and the signal for the speedometer.
the e24 with e38 technic would be great
greetings
sebastian