'68 4-speed cam?

toolmanmike said
I think the 1968- 340/4/speed cam was a 276/284-.429/.444 with a 114° lobe separation.

No, I think that was the auto cam.

In 68 the auto cam was: .429/.444 268/276 44 O/L

the manual cam was: .444/.453 276/284 52 O/L

Then in 69 and later all 340's had the 68 auto cam.