89 fj62 here. im gonna swap in a new(er) rear driveshaft. i tested out the tightness of the bolts, and as suspected, frozen. wont budge. im gonna torch them, but ive never torched bolts and nuts before, is there anything i should know? any tips? i am a little concerned about fuel vapor, but there is no smell of gas anywhere near the area. i wanna be safe of course.... thanks guys!