I'm slowly getting up to speed but wouldn't mind input or suggestions...
5.7 stock vortec pickup swapped with 6.3 (383) vortec crate motor.
Same intake. Upgraded spider injection system. 9.5 : 1 CR. Stock 3" single exhaust. 4L80-E transmission. C2500 pickup. Nothing special.
I want to get rid of knock retard at 3400 - 4500 RPM.
Also would like some suggestions to help it breath better above 4000 RPM.
I've attached some files for you.