For the love of god don't go the STS route.
As far as the low mount turbo oil seepage problem. If you make one or 2 decent sized drain sumps and let the turbos drain in the sump and then pump the oil out of the sump with something like a rear end pump (can't use the pressure section of a dry sump pump, they don't pump when they suck up air, you need a scavenge section or pump) you should be fine.
also be sure to avoid routing the drain hose horizontally and use as large a hose as you can use
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