Hi, I'd appreciate any feedback on this question. I've attached a link to a pic of my heater hoses on my 67 non-air conditioned L79. As you can see, there is only one heater hose clip or retainer. Should there be two? One on either side of the expansion T? Also, right behind the clip in the pic there is a small round hole in the inner fender. Is this hole supposed to be there? If so, what's it for? Thanks for any help.