So I came across a 67 Rally Pack online and bought it. I already knew that I'd need a new engine harness and dash harness. I called American Autowire yesterday to order up everything. The sales guy told me everything I'd need to send them to build them. I have an extra fuse block, but then he said I'd need another part, something to do with the brake switch? He said it came up on his computer while he was configuring it. He'd need to check with engineering to find out exactly what that is. It's only for this swap. It is not needed to build a non Rally Pack harness. Does anyone have any ideas what this could be? I have not yet heard back from him regards to this.