340 cam for 318

As with many things there is no free lunch ie there are always compromises and no 'best'. I thought this test demonstrated that. So the question is, what compromises are you willing to make?

https://www.hotrod.com/how-to/camshaft-shootout-lobe-separation-angle-tested-explained/
ps I see 273 just posted something similar 2 minutes before I did :)