Yes
In order to trade for a guy with a year left on his contract, he will have to reneg a new contract with the new team. This applies to both Henry and Surtain in this hypothetical circumstance, as Henry will obviously make more than the beans he makes now and Surtain would have to take a pay cut and be extended.
I may be foolish to think we could "work out" having that much salary in the seconday (depends in the market value of Surtain at 28 and Clements hopefully resigning before his contract expires), that remains to be seen. But when I think about Value, you gotta make the move with TH for PS... That's what I was getting at.