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LS1 in a C3

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Old Jan 7, 2006 | 07:42 AM
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Default LS1 in a C3

I've been thinking about putting an LS1 in my '75 and I'm wondering if anyone has done and what type of modifications are need for it. Thanks!

Edit: Sorry if this topic has been mentioned before. I didn't thinking about doing a search and I'm going to bed now.

Last edited by Demonic Possession; Jan 7, 2006 at 07:50 AM.
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Old Jan 7, 2006 | 07:55 AM
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yep its been done about 5 or so have done it and im in the middle of it right now.
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Old Jan 7, 2006 | 07:56 AM
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yep its been done about 5 or so have done it and im in the middle of it right now.
http://forums.corvetteforum.com/show....php?t=1267946
scooter70
budman78
70ls1
superjames
79ls1
and Me and i think one more too.
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Old Jan 7, 2006 | 09:26 AM
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But I have the fastest. hehehe. Do a shearch and you should pull up a lot of info. Also LS1tech.com is a great site to visit.
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Old Jan 7, 2006 | 09:27 AM
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Just out of curiosity how much of a PITA is it?
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Old Jan 7, 2006 | 09:40 AM
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so far for me i think its alot easier then adapting my tpi to my old style motor honestly.so far
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Old Jan 7, 2006 | 10:02 AM
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Originally Posted by MorpheusGPR
Just out of curiosity how much of a PITA is it?
Most the PITA is money. Lots and Lots of just little stuff that adds up.
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Old Jan 7, 2006 | 10:54 AM
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Originally Posted by Budman78
Most the PITA is money. Lots and Lots of just little stuff that adds up.
you got that right
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Old Jan 7, 2006 | 11:45 AM
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Originally Posted by Budman78
But I have the fastest. hehehe.
And I was the first.

Check out my website below.
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Old Jan 7, 2006 | 05:35 PM
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Thanks guys. Hopefully I can be added to that list Around how much did it cost? I'd be doing all of the work my self.
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Old Jan 7, 2006 | 06:13 PM
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Here is a rough list I made up. Be prepared to spend around $6K.

http://www.corvetteforum.net/c3/70lt1/costs.shtml
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Old Jan 7, 2006 | 06:41 PM
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"VetteDan" @ Vetteworksonline.com is in the process of that transplant too... http://www.vetteworksonline.com/

Click on "Engine Mods"... his LT1 conversion in a '76 came out GREAT!
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Old Jan 7, 2006 | 08:20 PM
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yeah how could i of forgot dan,he makes the motor mounts adapters for the ls1's
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Old Jan 8, 2006 | 02:22 AM
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I did my transplant with out purchasing any special parts every thing was simple with minimum fabrication. Between the posts hear and posts on LS1 tech, and 70LS1’s web site and similar ones, you’ll never have to ask any questions every thing is there. Good luck and be patient.
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Old Jan 8, 2006 | 06:25 AM
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Largest question I have is....about the bellhousing pattern/tranny bolt up, will it work with my existing SBC 700 tranny?? or a 2004r?? or does it take adaptors, and a bunch of junk?? also about the flex plate situation....

GENE
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Old Jan 8, 2006 | 08:19 AM
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Gene yes it bolts right up to my 700r4,only one bolt isnt there upper right side,no big deal,i used a c5 flexplate and removed the splined torque tube adapter from it and then used a crank adapter from gm with 6 of there longer bolts this centers the older torque convertor hub into it.Also if using the c5 flexplate theres 2 bolt patterns,new one for 4l60e convertors and the older 350/ 700/200 convertors.

Heres the part numbers for the crank adapter and bolts.

Spacer: 12563532

Bolts: 12563533 -6 needed

thats for the spacer and the bolts from the dealer
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Old Jan 8, 2006 | 09:12 AM
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Originally Posted by zamika0a
I did my transplant with out purchasing any special parts every thing was simple with minimum fabrication. Between the posts hear and posts on LS1 tech, and 70LS1’s web site and similar ones, you’ll never have to ask any questions every thing is there. Good luck and be patient.
Post some pics, I'd love to see your work.
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To LS1 in a C3

Old Jan 8, 2006 | 09:38 AM
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pics
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Old Jan 8, 2006 | 06:54 PM
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Originally Posted by 70 LS1
Here is a rough list I made up. Be prepared to spend around $6K.

http://www.corvetteforum.net/c3/70lt1/costs.shtml
$6K...that's not that bad. I was thinking it would come out more along the lines of $10K, so I've saving $4K Just wondering, does anyone have any recommendations of any places where I could buy an SL1 engine?
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Old Jan 8, 2006 | 07:01 PM
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$6000 wow ill be way under that ,more like $1500 you need to search for the deals.

go to ls1tech.com youll find some good deals on there.
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