I think I finally need tailpipes. Options?

No need for fuel pump relocation. Have the tail pipes run like a 68-72 Nova. Run them over the axle, then turn and go between the the leaf springs and out right under the quarters. Looks better that way too. I think they look stupid as hell with the pipes stickin out the back.

Like this.

X2 my best friend in high school ran his exhaust on his 65 mustang that way, and it sounded great, and did not fume.