Remap is definately a must.
Your injectors (440`s) will be fine i would think.
Definately an uprated fuel pump...
As a comparison, my TD04 gave up the ghost, and i went from that, to a TD05/06, then to a VF34, another 05/06, then down to a VF30.
All needed remap. And i wouldnt recomend running it on boost without being mapped.
I ran mine from just the wastegate until the remap, so wouldnt even make 0.5 bar. Nice`n safe.
I also moved from standard pump to a Walbro 255lph, and changed my injectors from 380cc (my98) to 440.
Hope that helps.