I'm on the fringe of the 110 spots for Dallas.
I reside in rural west texas, but had been "living" in NYC until last weekend. When the NY locals went off CONUS I "moved" to Dallas after consulting spot beam charts with inaccurate transponder info that led me to believe I could easily pick up the Dallas locals. It's close, but no cigar. I have better reception of 61.5 and believe my chances of a usable signal are better.
61.5 locals are all on spotbeam, so there is no reason to think that you will receive them any better on 61.5.
Possible - but unlikely.
However - you can test that right now.
Go to the signal strength screen, set the satellite to 61.5 and set the transponder to 15.
Even though the Dallas channels are not available from 61.5, they are transmitting on Transponder 15, so you should be able to see if you can receive them.