IDMJ Posted January 28, 2019 Pete asked me to make a thread on the fuel tank setup I used on my ‘99 swap so here goes. Parts needed are: 2 pieces of 2 1/2 x 1 1/2 .120 wall rect. Tube 24” long 2 pieces of 2 x 2 .1875 angle 1 1/2” long 8 pieces of 1/4 x 1/2 carriage bolts and, psi lock nuts 2 pieces of 3/8 x 6 stainless eyebolts, washers and, Nylock nuts stock MJ tank straps TJ fuel tank XJ fuel pump I positioned the fuel tank in the MJ location and set the front at 1 1/2” back from the rear of the cab. Marked where the rails go relative to the tank. Put the rails in the location marked with the 1 1/2” width against the floor. Marked 4 locations on each rail that match the lower ribs in the bed. Drilled 1/4” holes in the rails all the way thru and then opened one side of each rail holes up to 3/4”. I held them up to the bottom of the bed and marked the bed to be drilled with 1/4” drill also. Mounted the rails to the bottom of the bed with the 8 carriage bolts and spin lock nuts. Then I marked the frame below the new rails for the rectangular holes that have to be cut to hold the MJ tank straps. Quote Share this post Link to post Share on other sites
IDMJ Posted January 28, 2019 I put the tank in position and figured out where I needed to mount the tank strap brackets. Drill a 3/8” hole in one leg of the 2 x 2 brackets and weld them in place ( or you can bolt them if you don’t have a welder) with the leg with hole facing toward the center of the bed. Quote Share this post Link to post Share on other sites
IDMJ Posted January 28, 2019 I found a guy in Boise who would modify my tank for me so, I put the tank in position and traced the top of the frame rail onto the side of tha tank. Had him move the fuel filler to the side even with the fuel door above the frame rail mark and patch the end of the tank. Quote Share this post Link to post Share on other sites
IDMJ Posted January 28, 2019 I reused the MJ filler neck and, hoses. Quote Share this post Link to post Share on other sites
shelbyluvv Posted February 3, 2019 I have a TJ tank and kept the hoses in the stock location. I used a piece of radiator hose and a bend out of a cracked stock exhaust manifold. Check your driveshaft clearance. I had to have a 3" shaft built to clear the tank. Quote Share this post Link to post Share on other sites
IDMJ Posted February 3, 2019 I already have a 3” driveshaft and clears ok. I’d be happier with more but whatcha gonna do? 🤷♂️ I know that leaving the fill in the stock location is what everyone seems to be doing but hey, I gotta be different 😏 Quote Share this post Link to post Share on other sites
shelbyluvv Posted February 5, 2019 On 2/2/2019 at 10:48 PM, IDMJ said: I already have a 3” driveshaft and clears ok. I’d be happier with more but whatcha gonna do? 🤷♂️ I know that leaving the fill in the stock location is what everyone seems to be doing but hey, I gotta be different 😏 I am using a TJ cluster also. It is slightly different than the XJ cluster. I only did it to be different as well. Quote Share this post Link to post Share on other sites
IDMJ Posted February 6, 2019 I have a TJ cluster I thought about using but, the plugs in the back don't match the XJ dash. How did you get around that? Quote Share this post Link to post Share on other sites
shelbyluvv Posted February 6, 2019 It plugged right in. I have a 2001 TJ Cluster and a 1997 XJ dash harness. Quote Share this post Link to post Share on other sites
IDMJ Posted February 6, 2019 Hmm. My TJ cluster is a ‘98 and my XJ dash is ‘99. Quote Share this post Link to post Share on other sites
