273 and 318 doner parts for 340 Build

340 crank had the throws drilled to offset the 129g heavier pistons and 32g heavier rods of the 340. 273 rods will hold up. Cast cranks are usually heavier than forged. When you got a "340 forged" crank from PAW it was a forged 318 poly or 273 that had its throws drilled and register resized.

instead of adding heavy $$ metal to the throws, remove metal from the crankpin side.