340 cam for 318

One of the reasons i asked about advertised duration.

For example this lunati voodoo. They call it a 253/258 cam but the .050 duration is quite similar to the factory 340 cams.

https://www.forabodiesonly.com/mopa...o-700-cam-454-208-050.573145/#post-1974907166
I also pulled a summit cam from a motor to regrind. It’s basically the crane 272h but i also saw it seems to be the same exact grind as some 268 he comp cams.
So comp measured at .006” and crane at .0045” i guess.