My Mechanical fuel pump was leaking gas (onto my front differential) and oil (making me think my oil pan was leaking).  It would be so hot when it was running that you could not touch it. (hot fuel is not happy fuel)  And after the jeep would sit for a couple of days and all the gas would evaporate out of the carb, it would take 20-30 seconds of cranking to get her going! Time to get that thing outta there.

Materials - block off plate - $7
5-7 psi electric pump - $25
10gauge wire, switch, 10ft of EFI rubber gas lines and clamps - $20
I bought  heavy duty switch and wire even though the pump pulls <5 amps.

So just locate your fuel line directly in front of the fuel tank. Theres 3 hardlines there that look exactly alike, MAKE SURE you've got the right one, the other are a brake like and return line.  I clipped the appropriate hardline w/ heavy clippers then gently bent the line into position,  then used a hacksw to cut a few inches to accomodate the pump.  I drilled holes in the frame for mount and ground, and used some thick rubber sheeting to kill the rattle.
Then I removed the nasty old mechanical pump and associated plumbing, installed the block off plate and ran new rubber line from the hardline down on the frame to the filter, carb and return line.  Due to probable metal shavings in the line, remember to change your fuel filter soon after this procedure.
Wiring is as hard as you want to make it, I simply wired mine to the manual dashboard switch and got power from an ignition switched fuse. (only hot when the keys are in ACC or ON position).  Others believe that it should be switched according to oil pressure because in the event of an accident and severed fuel lines, the pump could continue pumping and pose a serious fire risk.

Final result?  Awesome, starts great every time, no vapor lock. Pump runs very cool, doesn't even get warm.

Update - 08/10/03 - After about one hour of stop and go driving in heavy traffic on a 100 degree day (at a mile hi in denver) I vaporlocked,  I managed to pull off into the shade and after about 15 mins with the hood open, the pump started pumpin liquid again and I was on my way.  After this incident I will be insulating my fuel lines and possibly a fuel cooler from summit.
 

new E-pump, inside framerail under drivers seat.


 
 

stealthy switch - those cool knobs are machined aluminum, held on by a grub screw, Currie # CE-9036

 

so long sucker!

 

block-off plate

 

Vivacity, leadership, must be had, and we are not allowed to be nice in choosing. We must fetch the pump with dirty water, if clean cannot be had.
- Ralph Waldo Emerson  “Power,” The Conduct of Life (1860).