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TJ BLOCK Interchange

Swaping 258 to 4.0, 4.0 parts to 258 etc!
Posts: 7
Joined: April 5th, 2011, 7:25 pm
Vehicle Year: 2004
Vehicle Make: Jeep
Vehicle Model: Rubicon

TJ BLOCK Interchange

Postby Cannonball » January 18th, 2017, 8:13 pm

Im looking to do a 4.7 stroker in my 2004 Rubicon TJ w/42RLE auto trans. I have heard many 4.0 donor blocks wont bolt up or have figment issues. What donor Engine blocks will fit and how do I tell what they are if they are out of the vehicle? Does anyone know? Casting numbers and or date codes? Where do I find them.

Thanks in advance because I have searched al over and cannot find any interchange info for the late TJ 4.o's.

Im not tearing down the old engine its only got 47 K on it and I'm saving it for my other TJ.


Learning to use the board
Learning to use the board
Posts: 34
Joined: November 25th, 2010, 8:43 am
Stroker Displacement: 4.6
Vehicle Year: 2005
Vehicle Make: Jeep
Vehicle Model: LJ

Re: TJ BLOCK Interchange

Postby duck454ss » May 17th, 2017, 12:00 pm

I'm using a 97 block in my 2005 LJ...... if you contact Brown Dog he will make you a set of motor mounts that will allow for your fit. when my engine finally goes in thats what i'll be doing.
Injection is nice but I'd rather be blown..... 4.6L, Eaton M112, Edelbrock Head, 31cc Dish Pistons, 1.7 Harland Sharp...

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