TJ 4.0 Block Compatibility Q

[jeepNV]

I am in the early stages of building a stroker for my 99 TJ. I plan to rebuild the original head, 258 crank and conn rods, etc, etc.

I currently have block casting #53010449 in my 99 TJ.

I have available to me a 4.0 block, casting # 53008405 ('92?)

Are these blocks compatible for a TJ swap, or should I be loking for a 97-99 4.0 TJ specific block?

Thanks for any help you can offer. RBD

[Bodo]

1996-1998
C/N 3010341, 53010449

Cast iron block, left side has five 2" cast plugs. Second bolt from pan rail on right side of timing cover is a through hole, coil mount bosses lower right front. Basically it is the same as the 1991-'95 blocks except for dowel pins in the deck for head and block alignment. Oil filter mounting on left side of block is pointing downward. Uses long main bolts and stud girdle. Has "NVH" on side to denote block strengthened for "noise, vibration and harshness" reductions (no visible differences).


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