I am looking at selling my stock primaries and secondaries, and getting my fuel system setup, but wanted to make sure a secondary top feed fuel rail and a primary top feed fuel rail will clear each other?

 

Its best to just use the 850s in a cut down primary fuel rail and upgrade to 1600s and a top feed rail for the secondarys.

 

Go with top feed on both rails and buy all new injectors. Top feed are much cheaper than Nippendenso side feed injectors and available in a bunch of sizes. The top feed primary rail makes it easier to clear the oil metering injectors if you want to use aftermarket fuel lines.

Are you going single or non-sequential with all the emissions removed? The secondary top feed rail won't work with an ACV valve in place. I ask since you're in California.

Jack

 

To answer your original question - the top feed rails will clear each other.

Jack