Originally Posted by diggers
Is it possible to install a 454 crank into a 409 I have a buddy who bought a car online the guy claims the 409 has a 454 crank. I was always under the assumption that the w engine was in a league of its own as far as interchangability goes is this correct or is it possibly?
1958 was a strange year. The "W" motor, 349/409 was the predecessor to the "porcupine motor" 396/427/454 and some of the dimensions were the same on both series of motors. You can use a 396/427/454 crank in a 348/409 block. I haven't done it personally, so I don't know what clearancing would be necessary. One of the slick tricks years ago was to use a 348 crank in a 454 block. 4.250" bore / 3.250" stroke to make a 368 C.I.D. motor for a class that was determined by cubic inches and weight. The big bore allowed big heads with big valves and the short crank allowed revs to the moon (same stroke as a 327 small block).
At the same time, over in Dearborn, the Ford camp was introducing the 430 wedge, later to become the 462. These motors had some dimensions that were the same as the later 429/460 motors. Several years ago, I bolted a Toploader 4-spd to a 430 using a Lakewood scattershield that was designed for a 460. Same bellhousing bolt spacing.
Interestingly, both the 348 and the 430 had combustion chambers that were formed by crescents in the piston crowns and the cylinder heads were dead flat with no chambers at all. I wonder how both manufacturers happened to introduce the exact same design at exactly the same time????????
Can you say "industrial espionage"?
This idea of the crescent combustion chamber didn't last long. Turned out the chamber was so long that flame propogation was poor and the motors were dirty from an emissions standpoint. I believe the 348/409 was produced from 1958 to 1965 and the 430/462 was produced from 1958 to 1966. I think 1967 was the first year for emissions equipment from Detroit.