Originally Posted by Pizza Man!
Someone told me the 4.0 was originally developed for Lincoln in the 60's, duno if there's any truth to that though.
Absolutely dead wrong. Lincoln (owned by Ford) NEVER used ANYTHING designed or built by American Motors (aka "Rambler").
Now AMC, on the other hand, used PLENTY of stuff made by Ford, when they were in business.
The 4.0 is from the same family of engines as the 258CID engine used in the AMC Pacer, Rebel, Ambassador, etc.
1992 XJ 2" lift -- RIP
2000 XJ 3" lift -- Australian Ford Big Brakes up front, rock rails, ZJ rear discs (with WORKING parking brake), C4x4 rear bumper/tire carrier, Hella H4 headlights, IPF driving lights, OEM skid plates, OME springs/shocks, JKS LCA's, JKS Sway Bar links.