I'm not very familiar with the L-series, so my input may or may not apply.
In my younger years with a KA-T setup, I moved to a hardbody flywheel with a 280z clutch. It moved me from 225mm to a 240mm disc. This is known as the "whitebunny special".
Well at that time, many folks were using RB20 flywheels, with the 280z clutch for the weight difference of the flywheel really. So I ended up trying to use my hardbody setup with a Z33 clutch. I had to drill a few holes, and resurface the ENTIRE face of the hardbody flywheel.
With that being said, when I went RB20 in my Z, I used the stock flywheel, mated to a 350z clutch. I even used an OEM replacement Exedy. While the RB20 is the torqueless wonder of the Nissan world, it's served me well, up to the 300 hp mark. At that point I had more issues with breaking the U-Joints in the Axles before I had issues with the clutch.
So I would recommend a clutch for a 350z, I would use an ACT HDSS. It's a full faced clutch, and can handle a good bit of torque.
So basically, we know the input shaft of the L-Series are the same as the KA, and the VQ (since I've used all three clutches on the same KA transmission). Obviously flywheels are different, but it won't because you are using a L Flywheel.
(Shameless plug). I can get you a great deal on an ACT clutch, or an Exedy clutch if you'd like.