In order to put any turbo or centrifugal supercharger on the SC400, I think the stock SC fan has to be replaced with thinner electrical fans that have 2" - 2.5" thickness. And that's what I'm looking into. I'm thinking of 2 12" fans that can pull around 1500 CFM each, which total around 3000 CFM for both fans. For that 42GR turbo, I think it's very unlikely to fit in there without the fan conversion.