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  1. #1
    Junior Member
    Join Date
    Aug 2011
    Posts
    3

    `70 CJ, will it fit a V8?

    I am looking at a friends `70 CJ5 that has a V6 Buick 225 "Dauntless" engine with less than 5k miles rebuild on it. I have always wanted to get rid of my `83 CJ7 but have always wanted a V8, be it in a CJ5 or a CJ7, I don't care, but I want it older than me, so `79 or older.

    I'm mostly curious to know if a 304 will fit in a `70 CJ5? I know these were termed "stubbies" or "short nose" CJs'. Also, would it even be worth it, I've looked at the HP/Trq ratings of both engines and I must say that I am surprised that the Dauntless has more horsepower, significantly, and only a little less Tourqe than the 304.

    Should I just drop the idea of a 304 and go with the `70 Buick?

  2. #2
    Junior Member
    Join Date
    Aug 2011
    Posts
    5
    SBC's were routinely installed in early CJ's. They required cutting the grill for clearance. An AMC engine would go in about the same.
    Personally, the 225 oddfire is the best power plant ever offered in a CJ and I would be hard pressed to find an upside to swapping one out for an AMC mill. They're performance parts are beginning to get a bit hard to find but are out there.
    Also, remember the drivetrains were barely adequate behind the stock V6, a massaged 8 is going to be breaking front diffs and transmissions.

  3. #3
    Junior Member
    Join Date
    Aug 2011
    Posts
    6
    I have been reading good things about the Dauntless.

    I haven't heard bad things about the drive train, what do you know?

    Also, does the `70 have a D44 as stock? I know this one has a D44.

  4. #4
    Junior Member
    Join Date
    Aug 2011
    Posts
    7
    The rear is a flanged 44 (good)
    The front is a 27A. adequate. An upgrade to a Powr Lok will really help carry the load. Common upgrade is a 30 from a 72 or later
    T case. Dana 18. Plenty strong. At some point you will want to drop the inspection cover and inspect the intermediate shaft end play.
    Transmission. T14A. Weak. Will eventually give up under continued abuse.

  5. #5
    Junior Member
    Join Date
    Aug 2011
    Posts
    5
    The Dauntless v6 is incredible. I swapped one into my 62 CJ and LOVE it. More power than it needs, has a nice rumble with the dual exhaust, and it flat out FITS.

    You will gain nothing but headaches swapping from the Buick v6 to a V8. It will be heavier, so any slight power increase will be void. The only thing you get is "it has a V8" to tell people. Who is really going to care?

    And with only 5k miles on it? You'd be craze to swap it out a perfectly good motor that has more power than the Jeep can use as it is.


 

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