I have the e curve too. Works ok besides Chevy cap. Sits to high hit wiper motor. Have to change out cap and wires for clearance. Like the rev limiter and the curve select-ability. Give it a 6 out of 10.
To answer more questions, I'm thinking 6500 RPM is a good redline for 408 CID. Has anyone tried the billet MSD E-curve distributor, or did I just waste my money?