170ci to 210ci stroker

273 makes a valid point.I was lucky to have a sit down with Jack Clifford before his passing.In our conversation I stated to him that I wanted to build a large bore 170 and rev it high. His answer was the Slant is a torque engine and to build for power down low.At the time he also stated that the head will not flow enough for high rpm.When Tom Hoover designed the Hyper-Pak (for the 170) it too was making the most power in the 4000 to 5000 rpm range.That intake was designed for those rpm levels.Mr. Hoover also stated that with shorter intake runners the engine made more horsepower but was proven that the longer runner made more grunt(torque).Torque is what moves the car.Now this is talking about engines that are N/A with no power boosters such as turbos,superchargers,nitrous,etc.
The head can be worked quite a bit and it will help with higher rpm but not that much.
Any way you choose to build your slant is up to you.Just have fun with that six-in-a-row !

For some reason I may be slighted.............