Coupla things bother me with transmision hose:
1. Don't know if the inner liner is compatable with gas....
2. Don't know if the hose is high pressure line- that alone could be a BIG problem if you are running EFI.
My vote would be replace the fuel lines. At the very least google for transmission hose design specs from a hose manufacturer. Look for compatability of the liner with fuel and the burst strength of the hose.
I will never forget sitting at a traffic light in Ft. Lauderdale, watching a little smoke appear from the grille of a teener. Pretty soon, foot high flames were shooting out of the grille, and a large puddle was forming under the car. The driver looked in his rear view, noticed the fire, killed the engine. The grille relase was toast. He had to open the trunk and use a crowbar to open the grille. Then the gas under the car caught fire. I didn't realize that flaming tires expand when hot and eventually burst with a loud POP.
Two days later I was watching TV and on a West Palm Beach news show, the female reporter was walking through an auto junkyard doing her report. Behind her was a nice 914 with a burned out engine compartment. It was a different color than the one I saw go up!
Ken