What I find so amusing is that the 273 has a much lighter piston than a Poly and LA318. But the cranks are the same so the balance would be way off so Mopar put HUGE heavy wrist pins in to make the Piston/Pin combo weigh the same. You can put light weight pins in and then have about 4 pounds taken out of the crank.
If everyone is so hot over the larger bore of a 340 over the 318, why do they not get all fuzzy in the knees over a 400 Big Block??? Biggest bore of all Mopar V8's. Someone above said "Bigger Bore makes more power"