Best 273 and 318 builds (NO 360's please)

Bu tthen it's not a 318 or 273. No additional stroke. If all you care about is the "318" on the block then we can add that to a 340 block, make a 42? out of it, and have fun. It's either 3.91x3.31 or its not a 318. Gotta abide by the rules!!!!:D