I know it sounds like a sexy idea, but I would play him with Plekanec personally, who's more of a south/north kind of center, which I think could be best for Radulov.
Plus, playing Galchenyuk with Pacioretty already gives you two legitimate 30-35 goals scorer, plus Gallagher who's good for 20 with that pair. Giving a winger as talented as Radulov to Plekanec would balance our top-6. Complete that line with either Carr (who shows he could be effective charging the net) on the left side, or a Lehkonen mid-way through the season, and you have two good lines, I think.