Unported head quickness?

'71 Duster
360 .030 Keith Black flat top Hypers
Lunati Bracketmaster 292 Hyd.
unported 360 heads 2.02/1.60 w/3 angle valve job
750 Holley vac. sec.
Old style Performer RPM
Stock bottom end rebuilt, ARP rod bolts
727 stock rebuild w/3000 TCI converter
8 3/4 4.10 suregrip
Worn out 71' leaf springs
26" x 9" M/T on ralley wheels
Flowtech 1 5/8 headers w/2 1/2 flowmasters
3200#w/driver
12.60@107
Daily driver/street trim in '97-'99