Rubber fuel hoses in engine bay question, All the same size? How many meters? Options

[DC_neun_vierzehn]

'73 2.0 w/ original FI

Since I sprung a fuel leak in the engine bay, I've decided to replace all 4 injectors and replace ALL the rubber fuel hoses in the engine bay. I have no idea how old these items are and I'd rather have peace of mind with new hoses and injectors (vs. trying to skimp and deal with an engine fire).

I order the replacement injectors (Standard Motor Products FJ67) that come with the rubber elbows. Now I need to order the rubber hose. Are ALL the rubber fuel hose lines in the engine bay the same size (7mm)?

I don't see a precut kit on any of the usual 914 suppliers. I'm guessing I need to buy several meters of it and cut it myself. If so, how much do I need to order?

I'm looking at this option, but I'm open to recommendations : )

https://www.autoatlanta.com/Porsche-7-Mm-Fu...N-RN202811.html

[914werke]

So this seems to be a good segue to advise of a item 914werke offers. (IMG:style_emoticons/default/rolleyes.gif)
I try not to overtly market in others threads but in this case it made sense (to me)

So based on the descriptions provide by OP they are working on a D-Jet equipped (2.0L) motor.
Wisely they have recognized that it is prudent to replace old fuel lines with new (ASTM D4806) lines that are resistant to Ethanol blends found in so may locations now.

One design flaw I recognized with D-Jet equipped motors was the routing of a rubber line over the top of the motor from rail to rail.
OG, that line was clad in a plastic sheath presumably to protect it. Nowadays you'd be hard pressed to find a car with that sheath still in place & if you did IT NEEDS its line replaced!
Then reason this "design" is problematic is the top of the motor case is a very hot spot on the engine.
With the OE routing you ARE inadvertently heating the fuel being fed to the injectors.

914werke offers a simple kit that solves this issue that reroutes that fuel line using a pre-bent, & flared SS line in front of the impeller housing.
This location has the secondary benefits of being located in the stream of air being sucked into the Impeller, cooling the contained fuel rather
than heating it & limiting the amount of perishable rubber in the engine bay!