caming up a slant

I am going through this right now. I assume you are building a 225?
I built a 60 over 225 with a .090 decked block and a .090 shaved head. Running a Racer Brown 286 .520 with room to spare on stock flat tops. But it has different valves and springs. Stock 1960 cam is 232 @ .400, 71 up cam is 244 @ .410. You should be ok on valves after you change the springs. Doesn't hurt to check your combination before you start it up. 170 has a little less room to work with!