Will This Rear Fuel Tank Fit My 66cj?

For sale locally and I’m down to almost bare frame so probably the best time to do it.

Tank from 78CJ

Photo not working from my phone.

 

Here it is...

 

Measure the width of the tank but it should I used a yj tank in the boys 70.

 

A tank from a '78 should fit. Check Boyink's web page about installing a tank like this in his CJ-6. You can find it with the Wayback if it's no longer on the web.

 

In simple terms, No. Can it be made to fit by cutting away all the bracing in the back of the frame, trimming the bumper and crossmember, yes.

 

I built my frame and made my rear tank fit. I guess it was from a 76 or something. 15 gallon. The biggest issue I has was the possibility of the axle housing hitting the tank. There isn't a lot of clearance. If you still have the bracing and tow hitch, as Daryl has stated, it will need to come out. Yo albs need to think about filler houses and inlets. I am very happy to not have the underseat tank, but only because it allows a lower seat height. I also like the extra 5 gallons.

 

Thanks for the replies. I was aware that I would need to remove the bracing and cut a hole for the filler neck. The fit between the cross members was my biggest concern. Now also concerned that the pumpkin will hit. I did a YJ spring conversion and that is supposed to have more flex. The 2.5" lift springs may counteract that. I'm just not comfortable sitting on that stock location tank.

 

People been sitting on those tanks for almost 80 years. Arguably much safer then underneath in a rear end type collision. Only real downside is a gas shower in a rollover but let's try to keep them shiny side up.

 

Back when I had my '69 CJ, I rolled it twice: once in the snow (3' deep and only casualty was a slightly bent soft top support) and once when I got t-boned at an intersection. Never leaked a drop of fuel either time. Engine oil, OTOH...

 

What’s Wayback? I remember that build but didn’t find it.

 

Gas Tank - Installing Rear | SSDutch CJ6 Jeep Blog | Boyink

 

Do folks typically run the stock fuel pump (Dauntless) with a rear tank or install electric pump? Where about along the system would be best to install an electric pump?

 

All the intermediates and nearly all lates were carbureted, using a conventional mechanical pump. The rear tank is no worse for the mechanical pump than the under-seat tank. If I wanted to run an electric pump, and keep the under seat tank as well as add the rear tank, I would put the switch in the floor between the driver's feet and the pump in the left-hand frame rail, as far back close to the under-seat tank as possible. I'd keep the pump away from the exhaust heat. If I were running just the rear tank, I'd put it in the frame rail just forward of the rear frame kick-up. It's best to mount the pump low and as far to the rear as possible.

 

Thanks Tim
Thanks also for the countless helpful post I see from you every day. Your input, knowledge and research makes ECJ5 an fantastic place for all of us.

 

Glad I could help.

 

Electric fuel pumps always perform best when they push fuel rather than pulling it. As close as reasonable to the tank, the better.
Mechanical pumps create a vacuum, so can pull fuel with no issues.
-Donny

 

X2 same set up on mine

 

I’m not at all sure what these nipples are for (smog) but I think I read something about connecting them to delete. This OK?