What should i change to get into high 11's?

goldmember said
Ditch the Edelbrock for a 650-750 holly DP,upgrade the converter PTC 9.5" street converter 4000ish stall would work great for street strip use,3.91 or better gearing should get you high 11's.

This^^^^. Your sixties are LAAAZZZZY! A DP Holley and some verter are ay numero uno....