Coming from a design standpoint, what's the best combination for road racing? High rpm horsepower or leads of lower end torque? Would a stroker 273 be better than a destroked 340? (that doesn't even sound like a fair comparison does it) LOL
IMO it’s almost always the biggest bore you can get and then make the stoke finalize the displacement.
The issue becomes (it haunted Chrysler for decades) is deck height and rod length. If you have a 9.560 deck and a 2.9xx stroke, you need one hell of a long rod, or a long compression distance on the piston or a compromise of both.
Chrysler finally started making shorter deck blocks to help with this. I’m all for relatively high rod to stroke ratios but once you are hitting the 1.9ish R/S ratio you are at the max unless you are incredibly induction limited. And I mean something like a 1 venturi carb on a tool box for an intake manifold.
So if you are interested in doing what the OP a is looking at, he really needs to sit down and write it all out. If he wants to be competitive he will need a short deck block with at least a 4.04 bore (depending on class rules for cylinder heads) and then he needs to see how he can get the R/S ratio livable with a piston that has a compression distance no more than probably 1.450ish.
