if you get the loom off jano then its 4 wires to conect to be fair you have to move all the old loom out the way un less you have a non injection loom that is
swap the inlet manifold /alternator over and fit the trigger wheels (basicly doing a cam belt change) there is a few other bits to do but i recon a weekend tops to get it fitted if you know one end of a spanner from another