Are these worth it?

Ending under the car means loud. The sound bounces between the chassis and pavement like a megaphone, exciting everything it hits. You will have a constant headache, and be a magnet to the cops, and you're wife will kindly decline a second ride.
If you are bucks down you'd be better off with the cheapest dang 3-pass mufflers and proper tailpipes with turn-downs.
Your stroker will make so much torque that an H-pipe for street would kindof be redundant. Not so the X-pipe. But you can always install it at some other time.