I believe it's been done before, they just ran a large enough cam? And isn't the 170 pretty much a zero deck engine? It may be a whole lot easier to achieve quench with a 170 than a 225
Very outdated cam. I'm sure someone who knows more than I do could recommend you a better cam. Since the 170 isn't a monsterously undersquare like the 225, a more v8-esque cam may work well.