340 stock valve springs

physixx said

I think that the .410 lift of the 340 cam is a bit understated. I run a 71 340 Demon in the NHRA stock eliminator and they list the specs for cam lift from what was given to them by Chrysler. That lift is .468/.472. The actual factory cams were more in the .450 range so there would be a little bit more difference than the 318 cam at .390 lift. But that's just from my experience with the NHRA stocker 340s.

Ken

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All the respect for Stocker guys in the world here...I've only run two classes in my life, Stock and Top Fuel...and Stock was every bit as tricky! (Btw..I had the IHRA I/Pure record back in 87) At any rate, we're both wrong. The 71-73 factory stick was .430/.444. The one you described is close to the "restoration" cam offered by MP...and the 68 340 Stick cam.
What I recommended to the OP still stands though. The 318 springs will work just fine.