6.7 Diesel turbo (he351ve)

Any one used one of these on a gas eng.

I have 3 of them. One completely dissembled, just to see how the VGT works and two that are un touched. One with a controller on it and one with out.

I would like to us one of these turbo for a 340 project down the road.
"A single"......is it big enough for 400-500 hp(crank hp)

All i see on the net is people using then on there 4 bangers.
Is it real that small for a turbo, for a small block gasser?????