340 camshaft

FWIW lets see then...
Snipped from a 2007 catalog pdf Jegs has on-line.
voodoo
upload_2019-12-11_13-13-16.png

Seems they are not the same.
And in that older catalog there is a lobe list.
For the Voodoo lobes
upload_2019-12-11_13-45-26.png

and
upload_2019-12-11_13-42-57.png
seems like someone's calulator died or their cut and paste skills failed..oops.

And for comparison with 2019 on-line catalog and cam web pages its easier to type into a spreadsheet.
upload_2019-12-11_13-48-52.png

That explains the two different durations. The 262/268 for the Chrysler is almost certainly a typing error or a marketing decision.
The evidence is there that the lobe is designed for the lifter.
Now we can discuss whether its idealized for the rod - stroke ratio.
Just kidding!
That belongs in a different thread....