318 build with dyno session

I voted stock stroke. Ideas swirl around in the back of my mind about how to do the numbers matching 318 for my 71 Challenger conv. I want to keep the 340 HP exhaust manifolds, so making a 390 (even though I have a crank) is kinda pointless. Stock stroke with Speedmasters or use a 360 crank with the mains turned down to make a 349 is what I'm leaning towards. This project might just sway me to stock stroke!