im not sure if u have clearance but 1.7 roller rockers,but they would take you from .480 lift to .510 lift.and 1.72 will make .516 lift.
if u have a manual i would suggest a short throw shifter.
seems like u have alot of motor work done.i would concentrate on suspension including: shocks,struts,rear control arms,new bushings,subframe connectors, and even possibly a lowering kit.
then i would start trying to drop weight including : rear seat delete,delete unwanted accesories,aluminum drive shaft, etc.
also i think i would get a dress up kit for the motor.no offense but the chevy orange has to go
i have a good set of valve covers listed in the classifieds. then maybe a new air cleaner.
---------- Post added at 10:16 PM ---------- Previous post was at 10:15 PM ----------
you have plenty of knowledge just because you have us to.