Diesel turbos have different seals. I think they will leak oil with a gas motor vacuum behind them? Heard that somewhere... but you can always buy a gas motor seal for it.
Diesel turbos weren't designed for vacuum. Using one on a gas engine in a blow-thru fashion shouldn't create issues, so long as a blow-off valve is used. The blow-off valve will keep excessive pressure from blowing out the seals from the inside.