G'day,

Yeah, there's been a few guys around who've t'boed the Alloy headed 6, those throttle boddies flow quite impressive numbers from factory, A while ago there was a t'boed XF? in Streetmachine Magazine,

As for mods, the usual will certainly help, like balancing the crank, lightening it all, dropping the comp ratio, and a "good" port job will certianly help. I've heard of 10 psi + being stuffed into 'em

They're a big torquey engine, but they can go real hard (for a 6)
A couple of mates have played with them in non t'bo cars....

Outback