I think you might just be able to make that power ATW, your limiting factors will be how well the old MFI system fuels (some have been known to only manage 180bhp, but others have hit 240bhp), and your Stage 2 T3 is only rated to around 225bhp.
Either head will be fine IMO, but that standard cam will be better if your wanting to keep power in the midrange and not up at the rev limter!

I'm in a similair situation/spec (not low comp though) and am just waiting to get my head back from NMS, then i'll be in for a setup and aiming for around the same power as you.

Also i'm talking GENUINE ATW power hrere! I'm sure there will be lots of people come on here and tell you what they have got from there Stock T3's and MFI fuelling etc. that are way above that but i'm just going by what I have been told be reputable tuners rather than my mate down the pub