Does anyone know if the factory Brembo brakes on a G35/350Z will fit on a fd3s and how much tweaking would be involved?

 

Highly doubt it... but you never know till you try.

 

You need to get custom brackets and brake lines made at the least.

 

if you want "bolt-on" you might have better luck with the evo / sti brakes calipers
they are somewhat "bolt-on" to the 2nd gen FC, search on the 2nd gen forum, theres a guy in the road race forum just did the same thing as well

since the FC and FD use the same calipers it should just bolt in no problem
but I am not sure what brake rotors you will be using.

 

why not brembo brakes that were made for the fd?

 

I have a g35 with two sets of brakes both the regular brakes and the brembo ones.