add to that the weight of the RB25 gearbox...they weigh plenty more than say a w58 for example...

sideways bulk between the strut towers isnt such an issue to handling characteristics, but weight/bulk forward of the cross member most certainly causes headaches...

personally id only ever run a 4ag variant or an sr20ve build myself...but id most certainly pick a 1uz or even ls motor over running any kind of RB...