Today was a good day

[Vova]

Got a nice little gift today. My neighbor has this nice 1970 Chevy truck. Battery dies so he decided to pick up a new one and long story short hooks it up backwards because the PO used red for the ground and black for positive.
Needless to say it melted some wiring.
Since he doesn't want to deal with the mess and has another newer truck he gave it to me
Ran great before the wiring fried. Now i need to figure out if I can just replace the melted wires or put in a new hardness. Also need to figure out what else was taken out.
Any advice would be appreciated...