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06-09-2020, 02:07 PM
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#1 |
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Registered User
Join Date: Mar 2013
Location: houma, louisiana
Posts: 25
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69 GMC LS Swap - ports on intake
Doing my first LS Swap, pulled 5.3 from 2011 tahoe with 6l85 trans
have most everything connected, but I don't know what these lines are for. First picture is on rear of factor intake Second picture is on front left of motor, looks like a vacuum line. Any help is greatly appreciated 
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06-09-2020, 02:57 PM
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#2 |
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Moderator
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,162
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Re: 69 GMC LS Swap - ports on intake
Port at rear on intake is for power brakes...you will need a new fitting barb to replace the factory push fit one....
Ports at front of engine are emission related....what emission components are you using on your finished build? Let us know and we can suggest best layout for front ports. There is a dedicated LS Swap sub forum on our board at https://67-72chevytrucks.com/vboard/...play.php?f=206 We can move this post over there if you like and you will get much more info.... 
__________________
Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox 
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06-09-2020, 06:03 PM
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#3 |
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Registered User
Join Date: Mar 2013
Location: houma, louisiana
Posts: 25
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Re: 69 GMC LS Swap - ports on intake
Please move, Thanks
I am going with Wilwood manual breaks, no booster Not planning on emission components if possible |
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06-09-2020, 08:10 PM
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#4 |
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Registered User
 Join Date: Apr 2012
Location: So. Florida
Posts: 873
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Re: 69 GMC LS Swap - ports on intake
see my post in the lsx section
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06-10-2020, 12:13 AM
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#5 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,601
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Re: 69 GMC LS Swap - ports on intake
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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06-10-2020, 09:19 PM
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#6 |
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Registered User
Join Date: Apr 2012
Location: So. Florida
Posts: 873
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Re: 69 GMC LS Swap - ports on intake
Thanks mongo
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06-12-2020, 10:49 AM
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#7 |
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Registered User
Join Date: Apr 2004
Location: Boiling Springs, PA
Posts: 435
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Re: 69 GMC LS Swap - ports on intake
sounds like cap the first 2 circled items (brake booster and front evap fitting).
the lower one circled, coming off the valve cover pass side front, you want to hook to fresh filtered air (intake tube). this is the PCV clean air draw.
__________________
71 C10 long bed, 2003 6.0L, 06GTO E40, T56, 12bolt 4.10 rear |
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