I ride my horse with a halter, a rope halter much like the one Bucky's Buddy is wearing below. I attach the leadrope so both are attached to the loop under her chin. i.e. the usual place for leading a horse
However, I trained my horse to be ridden in a halter as she hates a bridle. i suggest doing some ground work to make sure your horse doesn't get confused when you ride him in a halter before getting on.
I'm not sure that a halter is really a solution to your problem though, if he's going to pull and be really strong, he'll do it in a halter or bridle. I think its more of a training issue you'll need to work through with him.
When I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes. ~William Shakespeare