340 dyno chart thoughts

Lustle said
Hughes STL5054AS-8 250/254 -108ºLSA - Intake valve closing angle 64.

Lustle said
Uhhhh right from the manufacturer. So, you're wrong.

This is the manufacturer's description of that cam?
Hughes Engines

Show me where it says IVC 64 ABDC on this page please.

All the values on this page are correct for the duration and lobe separation with 4 degrees advance.

To get IVC 64 ABDC you will need 11 degrees retard. good luck with that.