I agree with you. Not saying you can't get the same stuff on an LA. Just saying that it all comes from the factory on a G3, while it takes aftermarket parts to get them on an LA.
Dang, I forgot coil on plug, too. Again, easy enough to do on an LA, but it is still a custom deal while the G3 has it from the factory.
And I think you would be pretty close to the cost of a 5.7 crate motor to put W2's on an LA. Even the cost of a set of TF heads would get me pretty far down the road of a full EFI G3 swap.