dual setup question?

I might be in a wrong section. I don't see a turbocharge diesel section?

I have a 96 Cummins n my dodge. I'm pushing 40lbs now, maxing out my hx35/14
setup. I believe I have plenty of fuel for duals now. My egts surely shows
that I need much more air.

What would be a good dual setup? I've heard debates over ballbearing or
"standard" bushing type turbos. I know the ballbearings will spool faster..

Oh, yes I'm O-ringed and ready for that 80-100lbs boost range..