Hi guys a friend recommended this site for some chevy tech help so here I'am.

I have recently rebuilt chevy 350 in my 1979 C10 and I just swapped intake maifolds from stock to an edelbrock performer and she runs great the only problem is when I gun the throttle it responds very quick but theres also some pre detonation knocking and was wondering what could be causing it. I was thinking it could be too running rich/lean? or should I just drop the money for some more octane fuel? Any help is greatly appreciated.

more info:
rochester quadrajet carb (recently rebuilt)
edelbrock performer intake
hooker competition headers