[Jack Houpe]

Chris there are alternatives that take advantage of modern technology in HVAC but it requires a lot of work to do it properly. Running the copper line sets from the bays where the old SCS units are located is not easy although I asked a mechanical engineer who does nothing but cooling on major computer buildings for AT&T about running rubber lines and he said why not, of course over time they could deteriorate but not in my life time left on this earth so thats something to consider. Also if your going to put a ducted evaporator into the current Newell ductwork it needs to be a home type for central HVAC system, they have over twice the CFMs as the smaller ducted units.

The 3.5 tons we installed will heat you in the winter and cool you over 100 degree outside temp and will take the coach from over 100 inside to sleeping temp in 20-30 minutes top. Here is the video I took last winter. 

https://www.youtube.com/watch?v=as7H3-O_uNI