Just be sure your vang has the length/reach to accommodate the extra boom lift. Otherwise I don't see any problem with doing this esp if boom clearance is an issue safety/convenience wise.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"