No spark and i can only get 5V at the coil.

Very first thing I'd do is trace the brown wire from ignition switch, start to finish.

Could be a bad ignition switch

Could be a bad connection AT the switch connector

Could be a bad connection at the bulkhead connector

As hacked up as that wiring is, someone may have done something "amiss."

I just put a brand new ignition switch in the car last week, wired up exactly the same as the last one. The blue wire from the ignition switch shows 10.9V coming out of the ignition switch at the connector under the dash by the steering column , firewall connector and at the ballast. The brown wire shows 5.6V at the connector under the dash by the steering column, firewall connector and at the ballast as well.