Any good Heater Box Rebuild write-ups?

I finally got it in and the only things I noticed are the controls are very tight, but I assume that is because of the new foam rubbing inside. Also, I noticed after everything was hooked up that the heater tubes didnt come through the firewall barely enough. The tubes have a rib on them and the clamp goes behind this rib, but I think 1 clamp might be on the rib, so I might see if I have some original clamps around.
I did come across this writeup....

http://www.moparmusclemagazine.com/...ymouth_valiant_heater_box_assembly/index.html