After reading topics about supercharger+turbo combo I have idea now. I have lots of left over parts from my previous projects and maybe is good idea to start using them.
I have: 4BT rebuildable core with P-pump, new 2,0L supercharger (122cid) and good Holset He451vgt (60mm)
Together with 13mm p&b and with good injectors like 5x18, it should be powerful setup
Seme size setup for 6BT should be: 3,0l supercharge and 80mm turbo, this type setup have done before with good results