Full rewire on 76

I have a 76 I've been shopping around for quotes on full rewire. The ones I've gotten have been all over the place. Between 5k and 15k. So I'm trying to just get opinions on what more seasoned owners have paid for rewire on their girls. I've been only calling/emailing places with good reviews and who have been in business for a while. I don't want to take chances with her.