swap question

[Valiant240sx]

Ok my sohc ka died, Ive bought a dohc from a obd1 95, I know I need the 91-93 distributor, throttle cable, intake manifold.

My car is originally a sohc manual transmission.

I cannot find a dohc wiring harness around here to save my life,I've found an auto harness for $35 dollars close by, would anyone know if I can use a auto harness or how difficult it is to use?

I assume all the motor plugs will be the same, and that I would have to use my existing trans harness, but I don't know how it will work with the gauge cluster....

any input is greatly appreciated.