Originally Posted by ST33LR4T
i am currently running a 94 4.0L HO block in my yj. i have a line on a 89 4.0L reanix block.
i want the 89 to build a stroker with so i have as little downtime as possible.
can i use the 89 in my yj? ive been told the blocks are pretty much the same...ive also been told the mounting points on the reanix are different then the HO.
I can't definately state on this swap. If your vehicle was a Cherokee or Comanche, the reverse of this swap has been done. I bought a 95 4.0L HO block off a guy out of a TJ(for the head). He had an 01 block sitting there he couldn't use. He said the motor mounts wouldn't bolt up. I think on that engine, they didn't drill and tap some of the bosses towards the front of the engine. I am not sure if they have those bosses on the 87-90 Renix blocks, or if they are drilled. During that time, the Wrangler used the 4.2 (258).