Could I fit a v8 in an 04 l300?
 

I really like my l300 but I wish it had more power. There's basically no aftermarket anywhere for this car so is a vs swap possible?

Not really, but a very similar car also made by GM Europe is a Saab 9-5. Almost identical chassis as your L300 only with more power.

That sucks. Might have to look into that then idk.

Anything you do will have to be custom.
if you had the 2.2 youd have better options