Please send me pics, i can help with your layout if you want. Im very knowledgeable about forced induction, turbos especially have built dsm's and currently have a 500hp wrx. i can help u with getting it under the hood. a front mount isnt that big of a deal. to locate the turbo you will need to fab an uppipe off the collector of equal lengths from the manifold. after that its simple. what size turbo are u using, and another thing the stock td04 is super small that people are talking about lag.The max flow is 475cfm at 18psi, with a 3.5l motor it shouldnt be a problem pushing it. A 2.0l spools it under 2k rpm. what size injectors are stock in the vehicross , also people commenting about the bov springs. Thats why jdm used an hks ssqv bov its a pull type that works off vaccum so its closed at idle and reacts fast and if people are really worried u can plumb it back into the intake before the turbo. ideal is lower compression to run higher boost, but with tuning and a catless 3 in. exhaust there will be power. good luck with the build and im looking to pick up a vehicross as a fun project now. Dont mean to thread jack, just figured i can help you if you need it in any regards with the subaru turbo system.