I need to completely rewire my 1985 K30 Dually, and I was thinking of using the Painless 18-circuit wiring harness kit. I need to rewire both the interior and engine compartment. Does anybody know if the Painless wiring harness kit comes with the harnesses for both the interior and engine compartment? Summit Racing also has an 18-circuit universal wiring harness kit as well for half the price of the Painless kit. Does anybody know if these wiring harness kits are any good?