Splitting 77v8 is definitely one of the strangest basic strategy plays around. It's only correct in 1 or 2 decks, when DAS is allowed. It seems so counter-intuitive that it's almost guaranteed to bring a puzzled look from the dealer if you're playing a live game.
Have you cost yourself much by not making this play? Probably not.
In 2 deck DAS, splitting a $10 initial bet loses $3.87. Hitting the single hand instead loses $3.90. So you're risking another $10 to save $0.03 on average.
If there is a candidate for a play to ignore (like in another recent thread here), this would be a good choice.
Still, it's fun to make such an odd-looking play knowing it's the right one.