xf tail lights into an ef shell is like trying to squeeze a square block into a round hole....
WAYYYYY different shape.... just tint shade the standard tail lights as stated above and as i have done...
And be creative! dont VN commodore them! (totally black) Do light coats to get an even thin covering as to not dampen the globes brightness too much.. or use electrical tape to mask parts you want to keep bright/clear.. like the clear reverse light section...
Here's a pic of mine.. i put LED'S in mine.. tint shades and electrical tape..