The Hellion website says:
Multiple T4 turbo options available, (62/62 1000+HP) (62/62B 1200+ HP) (64/66R 1700+ HP) (68/70 2000+ HP)
Who talked you into the head studs and gaskets?
The only tires goodyear makes that I would use are insanely expensive (top of the line high performance tires). No way would I buy anything they have for any of my vehicles.
One of those videos was from guys from a piston ring company, the other is an engine builder who has put together and torn apart more engines than...
Who better to know?
I think if you want equal capability compared to the P1X you will want the G3R not the Gen 2. But you can make what the Whipple stage 1 makes with the G2