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Is this a 258?

Swaping 258 to 4.0, 4.0 parts to 258 etc!
dan10101
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Is this a 258?

Postby dan10101 » July 5th, 2017, 5:17 pm

Hi all, first post. Starting to gather parts for a stroker. I found this AMC 6 cyl but not sure of the engine size or year. The number on the side of the block says 402A19. Is this a 258? The owner doesn't know and I can't tell from the research I've done so far. Could it be a 199 or some other engine?

First of many questions, I'm sure.
Thanks,
Dan

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IH 392
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Re: Is this a 258?

Postby IH 392 » July 5th, 2017, 9:27 pm

402A19 should translate to 1971, February, 258CI, 19th day.
If the bellhousing is still on it the starter position will tell if its a 199 (starter on the left side under the manifolds), or a 258 (starter on the right side low by the oil pan).
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dan10101
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Re: Is this a 258?

Postby dan10101 » July 6th, 2017, 8:59 am

It doesn't have a bell housing, but maybe you can tell from this shot where the starter mounts? to me it kinda looks like under the intake/exhaust.

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dan10101
Posts: 6
Joined: July 5th, 2017, 11:21 am
Vehicle Year: 1998
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Vehicle Model: Cherokee

Re: Is this a 258?

Postby dan10101 » July 6th, 2017, 12:52 pm

The Seller has confirmed it is a 3199962 71 258. Thanks for your help!

dan10101
Posts: 6
Joined: July 5th, 2017, 11:21 am
Vehicle Year: 1998
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Vehicle Model: Cherokee

Re: Is this a 258?

Postby dan10101 » July 6th, 2017, 5:03 pm

Well I guess I'm starting a stroker build! :banana:

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Re: Is this a 258?

Postby Cheromaniac » July 15th, 2017, 9:30 am

dan10101 wrote:Well I guess I'm starting a stroker build! :banana:


If that's indeed a '71 block, the crank might only be suitable for an automatic transmission. The cranks changed to a different casting in '72.
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dan10101
Posts: 6
Joined: July 5th, 2017, 11:21 am
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Is this a 258?

Postby dan10101 » July 21st, 2017, 11:08 pm

Good to know. Lucky that I have an Auto.
Thanks,
Dan

dan10101
Posts: 6
Joined: July 5th, 2017, 11:21 am
Vehicle Year: 1998
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Vehicle Model: Cherokee

Re: Is this a 258?

Postby dan10101 » July 22nd, 2017, 10:05 pm

The Crank FAQ states the torqueflight needs an adapter to this crank. (71 258 12 counterweight).

It doesn't mention the AW4 that my 98 XJ uses. Anyone know if there is an adapter needed for this auto?


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