Help me diagnose my miss over 4500rpm.

Here's the ignition box I am currently using. Found out about it in Mopar Action. Big improvement over the new orange box I just installed that crapped out after 200miles. Price is pretty good as well.



Blue Ignition Control Unit 7,500 RPM
Part Number: 555-40805



JEGS Blue Ignition Control Unit 7,500 RPM $34.99


HiRev 7500® Ignition Control Unit