It is not a good idea to replace the factory oil filter with a "modern spin-on". The benz unit is not only a main and bypass filter but thermostatically controlls the flow through the cooler. This is way better than a single spin-on, if you need to move for clearance then just remote mount the facory unit. What trans are you planning on using in the FJ?
Hey looks great! I see you also have the motor with the cali emissions although yours has already been deleted. I kind of like the turbo mounted up high, and the intake looks like it flows better. I like your FJ! Keep us posted.