Turbo's are sweet, but to be competitive with the car, be ready to spend some coin to tune. I say this because FI is the only way you can somewhat be consistent / competitve. Not trying to start a debate on which is better, carb vs FI , but on a carb blow thru set-up it will never be consistent. Fast hell yeah, consistent no. I'm a carb kinda guy all the way, add psi I'd have to do FI personally. That alone is why I dont have a boosted fox.

Are you still looking to run a "class" with car?? If so use the k.i.s.s. method.

As far as placement of turbo, its only for acc's street or airflow race. On the low/rear mounted turbo, oil pressure feeds bearings but you would need a pump to return the oil to pan.