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Old 07-13-2011, 07:03 PM   #1
rchavez101
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4.3L/700r4 to a 5.7L/700r4

I recently called my local transmission shop and got some info that I would like you guys to verify for me. I have a 4.3L and would like to put in a 700r4. Eventually I would like to put in a V8 such as 5.7L which I think is a 350. Would the 350 bolt to the 700r4? They said that the 700r4 would have a special bellhousing to bolt to the 4.3L but possibly would not bolt to the 350. Please let me know you thoughts on this.
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Old 07-13-2011, 07:04 PM   #2
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Re: 4.3L/700r4 to a 5.7L/700r4

Sorry I forgot to mention the truck is a 94 chevy SWB.
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Old 07-13-2011, 07:10 PM   #3
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Re: 4.3L/700r4 to a 5.7L/700r4

you should have 700r4 in it already & bolt up it will..
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Old 07-13-2011, 07:16 PM   #4
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Re: 4.3L/700r4 to a 5.7L/700r4

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you should have 700r4 in it already & bolt up it will..
Pop's I am doing a swap from a manual to a automatic. I was told on this forum that the best way to go would be the 700r4 so I don't have to mess with the electronics. So for know it will be joined with the 4.3L until I get a V8.
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Old 07-13-2011, 08:34 PM   #5
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Re: 4.3L/700r4 to a 5.7L/700r4

Ok..i got you..tha 4.3 is most circles a 350 with 2 less pistons.. both it will match up to tha 700..
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Old 07-14-2011, 02:17 PM   #6
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Re: 4.3L/700r4 to a 5.7L/700r4

Yea I believe that both the 4.3 and the 5.7 will bolt right up to the 700r4 which would be a good choice to go with it your going to drop a 350 in it.
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Old 07-14-2011, 07:37 PM   #7
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Re: 4.3L/700r4 to a 5.7L/700r4

The one fact that has been left out,make sure you aquire a V8 700,as the V6 version,while externally identical,is built with weaker components.
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Old 07-14-2011, 08:12 PM   #8
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Re: 4.3L/700r4 to a 5.7L/700r4

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The one fact that has been left out,make sure you aquire a V8 700,as the V6 version,while externally identical,is built with weaker components.
Yes I am having them build it with the intention of putting a V8 behind it. Thanks for the assurance on this guys.
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Old 07-14-2011, 09:35 PM   #9
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Re: 4.3L/700r4 to a 5.7L/700r4

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The one fact that has been left out,make sure you aquire a V8 700,as the V6 version,while externally identical,is built with weaker components.
Says who..that's like sayin a th350 from behind a 292 is weaker than a th350 behind a sb400.
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Old 07-14-2011, 11:39 PM   #10
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Re: 4.3L/700r4 to a 5.7L/700r4

Says me,who has built hundreds of transmissions.You can believe it,or not.Makes no difference to me.But I can promise you it's a fact.
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