Hello,
Barry, 
Sorry about the pulled molars.  Our radiation at Rex in Raleigh is precise enough allowed me to keep my teeth.  I used the floride trays nightly and have no problems going on 10 months since diagnosis.  treatment finished in early Dec and I had my neck disection on Jan 31.  I assume you have a stomach tube.  I found that Boost or the Walmart brand to highest in calaries.  I took three bottles, three times per day.  That turns out to be about 2100 calaries.  I lost 65lbs, but needed to lose the weight anyway.  I also had the SCC at the base of the tongue and two lymph nodes.
If I can help further, my email is 
[email protected].  I will even give my phone number if you wish.
Steve