Timing lag??

okay, in all my other cars Mustang GT's and the sort..I had a distributor to adjust the timing (advance/retard) Right now my 3kgt is fine at an idle but bogs slightly under a load, it runs fine at moderate rpms, but when I start over the 100+ mark it seems like it wants to cut out..help the clueless guy out =-0

too high of boost and not enough fuel you better be careful or at least ur number 6 cylinder will be destroyed,either you need a fuel system (never hurts) or just bigger injectors and pump