If you’re looking to have everything in your engine bay as top-notch as the rest of your ride, having beautiful firewall rings might be just what you need. With a threaded back and ABS nut you can insure and nice tight fit on almost any fire wall thickness. Danchuk # 19079 have a black finish and are sized for 5/8" heater hoses and # 8 AC Hoses.
Note: Cutting one of the hoses in the ring and feeding wires thru is an option to use these as wire ways.
Danchuk has the largest selection of quality 55, 56, 57 parts for your classic Chevy project.