mini-starter and Unilite conversion... HELP!!!!

[Supergas990]

Guys, I need some real tech help here. I'm on the last leg of my restoration for my 67 Chevelle and have run into a real problem.

I've installed a Mallory Unilite conversion kit and an aftermarket mini-starter. Prior to the restoration the car started slow, but it worked. Now when I've got everything installed, the car will crank like mad, but I've cooked the white wire that runs from the + side of the coil to the firewall/fuse panel (not once, but twice now).

At first I thought it might just be the condition of the 40+ year of wire, so I replaced the whole length (coil to firewall/fuse panel), but then the whole wire started to smoke and melt.

So far I've got 5 hours into this thing and all I've accomplished is melting about 7 feet of wire.

Anyone been in this situation before? All the harnesses are factory run, so it's not like I'm recreating the wheel here.

Thanks in advance.

Blair