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Old 11-22-2022, 05:34 PM   #1
riz
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C10 crossmember question

I have an 81 C10 short box pickup that I will be putting an LQ4 6.0 LS and 4L80 trans. into... will the stock trans crossmember work or will I need a different crossmember?

IF I need a different one, what crossmember should I buy?

RIZ
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81 C10 short box

82 K5 Blazer
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Old 11-23-2022, 08:58 PM   #2
riz
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Re: C10 crossmember question

nobody ????
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81 C10 short box

82 K5 Blazer
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Old 11-24-2022, 06:20 AM   #3
lolife99
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Re: C10 crossmember question

Go follow this guy on YouTube.
He has several videos on LS swapping a squarebody truck.

https://youtu.be/3BRI84MXS90

You can also ask your questions in the LS section,…

https://67-72chevytrucks.com/vboard/...play.php?f=206
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Old 11-24-2022, 01:18 PM   #4
Ziegelsteinfaust
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Re: C10 crossmember question

You can slide the cross member back, and redrill holes.

I bought one of the adjustable versions with the double hump that I am disappointed in, and will just fab up something nicer when I get around to it.
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Old 11-24-2022, 07:01 PM   #5
Warrens69GMC
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Re: C10 crossmember question

Some of these trucks have a crossmember that drops on the driver side and some are the "butterfly models.

driver drop
https://www.ebay.com/itm/22523006938...xoCPC0QAvD_BwE

butterfly style
https://www.ebay.com/itm/37424242574...Bk9SR_6C6L2VYQ

get one for your year of truck

might want to consider one of these
https://www.ebay.com/itm/37432045390...Bk9SR7L9gb6VYQ
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Old 11-24-2022, 07:45 PM   #6
riz
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Re: C10 crossmember question

thank you......... i will use the ls section from now on.
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81 C10 short box

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Old 11-30-2022, 10:53 AM   #7
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Re: C10 crossmember question

Quote:
Originally Posted by Ziegelsteinfaust View Post
You can slide the cross member back, and redrill holes.

I bought one of the adjustable versions with the double hump that I am disappointed in, and will just fab up something nicer when I get around to it.
Who's bracket if you don't mind me asking?
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Old 11-30-2022, 12:13 PM   #8
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Re: C10 crossmember question

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thank you......... i will use the ls section from now on.
Some questions can be answered in either section. No harm or foul utilizing a different section of the site if the question asked goes unanswered or not answered within your time constraints.
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Old 11-30-2022, 02:47 PM   #9
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Re: C10 crossmember question

Quote:
Originally Posted by riz View Post
I have an 81 C10 short box pickup that I will be putting an LQ4 6.0 LS and 4L80 trans. into... will the stock trans crossmember work or will I need a different crossmember?

IF I need a different one, what crossmember should I buy?

RIZ
It really depends on the LS conversion motor mounts use, as they all seem to have a different engine placement. Fortunately, if you have to modify or build something, the transmission mount is the easiest to build/modify. I'm getting ready to do an L86/8L90 swap in my 84 and am currently researching a complete motor/transmission mount kits. I used the Dirty Dingo setup in the 93 that I'm doing right now and it worked great. However, I haven't been able to get them to return my emails to see if their setup works as well in the Squarebodys. Will report back once I figure it out.

Rob
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Last edited by Hart_Rod; 11-30-2022 at 02:57 PM.
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Old 11-30-2022, 09:28 PM   #10
1957 Chief
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Re: C10 crossmember question

Quote:
Originally Posted by Hart_Rod View Post
It really depends on the LS conversion motor mounts use, as they all seem to have a different engine placement. Fortunately, if you have to modify or build something, the transmission mount is the easiest to build/modify. I'm getting ready to do an L86/8L90 swap in my 84 and am currently researching a complete motor/transmission mount kits. I used the Dirty Dingo setup in the 93 that I'm doing right now and it worked great. However, I haven't been able to get them to return my emails to see if their setup works as well in the Squarebodys. Will report back once I figure it out.

Rob
Jamey @Metaltek for mounts.

Will send you a text.

Bubba
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Old 12-01-2022, 02:40 PM   #11
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Re: C10 crossmember question

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Jamey @Metaltek for mounts.

Will send you a text.

Bubba
Does he make them for 8L90s?
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Old 12-16-2022, 02:32 PM   #12
PunishedC10
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Re: C10 crossmember question

Not sure if you found the answer you are looking for but I have an ‘85 with an ls1/4l80e. I hated the factory cross member. Some of the bolts are under the body/on top of the frame, it’s odd shaped for the one exhaust pipe to clear….
I used one from TejasSteelWorks or something like that. I believe I have an old build thread on here that will have pictures
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Old 12-18-2022, 01:50 PM   #13
Ziegelsteinfaust
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Re: C10 crossmember question

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Originally Posted by Hart_Rod View Post
Who's bracket if you don't mind me asking?
Summit racing I believe


It's one of the double hump fabricated ones they sell
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