I did this about 5years ago in my B13 on a U13 Sr20det engine ......used a parallel setup with two T3 turbos with A/R of .3 Turbines.....Had some lag but when she boosted it was excellent. Didn't do anything much but played with timming, spark plugs and boost levels.... Original U13 Front mount Intercooler with turbos mounted one above the other...
Definitely had to run slimline fans in front of the Condenser....Y'ed both intake and exhaust.... Had this thing running for about 2 years until a turbine seal blew giving way to a spun bearing.....