Here is a new Factory Fit underdash wiring harness for your 1957 Chevy. This harness is for a stock 57. This is the best harness on the market today. Also comes with wiring instruction sheet. I put a set like this in my 57 last summer and it works and fits perfect. This is a part you will be very happy with. You are a big part of our business and we are glad to help you out with your Tri-Five needs. If you are looking for more. Chevy parts take a look at my other auctions or. On the link to my. The free listing tool. The item “57 Chevy Underdash Wiring Harness NEW 1957″ is in sale since Sunday, June 08, 2014. This item is in the category “eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Other Parts”. The seller is “muttonhollow” and is located in Kaysville, UT. This item can be shipped worldwide.