Help with Fuel System design...
 

I am in the process of putting together an LQ4 swap into a 64 Nova.

Are there any good resources for choosing parts for the fuel system components? Like what size fuel line, etc?

I am thinking of running a carb first, but want flexibility to convert to EFI at a later date. Any suggestions on the best way to do that?

Here are a few links will get you started:
https://ls1tech.com/forums/conversio...or-filter.html

https://ls1tech.com/forums/conversio...-fittings.html

https://ls1tech.com/forums/conversio...ilter-fpr.html

https://ls1tech.com/forums/conversio...regulator.html

https://ls1tech.com/forums/conversio...71-nova-4.html

https://ls1tech.com/forums/conversio...ilter-reg.html

Give this a shot. Change out the fuel tank sender fittings to match your application and this becomes universal

http://i150.photobucket.com/albums/s...UELSYS-REV.jpg

Pocket, forgive my NOOBness, but where would the inline pump go in that diagram?
Thanks

right here with 2 more connectors
http://i128.photobucket.com/albums/p...UELSYS-REV.jpg

Keep in mind that you will probably want much less fuel pressure than what the corvette filter/reg will let through. Also, depending upon your power goals you might want to step up to a -8AN line (for 500HP+).

Carb vs LSx EFI fuel systems are completely different. Carb is low pressure large diameter designed to pump a large volume of fuel and return the unused portion. LSx is high pressure smaller diameter to send a very consistent high pressure system that uses fuel as it's required

Theres no way to build a carb swap with the C5 regulator

What I was thinking is Tanks Inc. in-tank pump, with an inline filter and a regulator from Aeromotive that has swappable springs to change from adjustable 3-20 psi (for carb) and 20-65psi (for EFI)

If I did that then all I would have to do would be to swap the spring in the regulator, and I could use the same setup right?

If you are going with a carb you can just use a in-line pump such as a Holley Blue pump and be adequate for the bare minimum. A carb'd LS/Vortec is no different than the SBC style electric fuel pump requirements. For line, 3/8" or -6AN is usually enough for a stock displacement engine that is naturally aspirated.

The Tanks Inc setup sounds good if it is dual purpose capable (carb/EFI), I'm not that familiar with it. Seems it will be returning a ton of unused fuel to the tank if you use a EFI pump at carb fuel pressure.