CAR - ADM Sprinter
MOTOR - Initially a 4AC - converting to a 4age smallport. Smallport is complete and already in RWD configuration, including intake, loom, ECU and oil-cooler setup.
USE - streeter

Hey guys, just trying to get my head around this conversion.
(When I say conversion, I started without an engine in the car, so am probably missing some pieces.)

I've searched through the forums, and want to confirm a few things.

1: The fuel setup. It's my understanding that in order to run the 4age, I will need to run either a JDM fuel tank, or an in-tank setup/external setup. Is this correct?

2: When converting, are there any mechanical parts that I definitely CAN'T use?
For example, clutch and brake setup (master/booster etc.) I figure they're completely independent from the engine itself, correct?

I have the driveline sorted, with a T-50 through to a T-series diff.

Basically, are there any extras required in order for me to get the 4age in and reliably running apart from what I already have?

I'm pretty much new to the mechanical world. Is it harder than putting a 5k-c into a ke70? Because I successfully did that, haha.

Thanks in advance!