What is the difference between a 348 CID Chevy engine and 409 CID Chevy engine?

348--(250hp, 280hp, 305hp, 315hp, 320hp and a 335hp) Originally only a truck engine introduced in 1957 Cubic Inch=348 Bore=4.125 Stroke=3.25 Firing order=1-8-4-3-6-5-7-2 Engine Weight=640/650lbs Forged Crank=has round flywheel bolt flange Connecting rod length=6.135 inches Crankshaft mains=2.4977 Push rod length=exhaust 9.140, intake 8.772 Push rod diameter=5/16" (all) Fuel pump push rod length=5.75 inches Dipstick on Drivers side Ignition timing=4 degrees B.T.D.C. Spark plugs=AC44 (standard), AC45 (hotter), AC43 (colder) Spark plug gap=.035" Rocker arm ration=1.75:1 Internally balanced All 348's were assembled at the Tonowanda plant. 409--(340hp, 360hp, 400hp, 409hp, 425hp First year of production 1961 Cubic Inch=409 Bore=4.3125 Stroke=3.5 Firing order=1-8-4-3-6-5-7-2 Engine Weight=640/650lbs Forged Crank=has bell shaped flywheel bolt flange Connecting rod length=6.00 inches Connecting rod weight=25.025 ounces Crankshaft mains=2.4977 Push rod length=exhaust 9.140, intake 8.772 Fuel pump pushrod length=5.75 inches Dipstick on Passenger side Spark plugs=AC43N (standard), AC44N (hotter), AC42N (colder) Spark plug gap=.035" Rocker arm ratio=1.75:1 Internally balanced X on block starting mid year of '62 All 409's were assembled at the Tonowanda plant. Production of 409 equipped cars: 1961-142 1962-15,019 1963-16,902 1964-8,864 1965-2,828-(2,086 340hp/742 400hp) 43,755 409 engines were produced from 1961-1965. These totals do not include trucks
The 409 was a 348 bored .187 over. The 348 was 4.125 x 3.25. The 409 was 4.312 x 3.25