Another arrangement to consider is shown in the attached photos. The premise for my resto/mod was "how would the factory upgrade an early 260Z", if they were to offer a moderately higher performance street model. Keeping that thought in mind, the carb system includes a factory NOS electric fuel pump with filter, mechanical fuel pump, custom fabricated fuel rail and balance tube.
The fuel rail utilizes the original brackets, modified as required, and stainless steel tubing. The rail includes lines for fuel supply and return, vacuum for the distributor vacuum advance and vapor canister, and canister purge. The return line contains the flow restrictor from the original fuel rail.
If you look carefully under the carbs in photo ending in 007, you'll see two heat shields. The one directly under the intake manifold is either from a 240 or 260Z. The other shield came with the Mikuni kit. The shields overlap and are bolted together.
The rubber sleeve fuel clamps for the SS braided hose are an British car item.
Hope this helps.
FixItMan