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#1 |
Registered User
Join Date: Sep 2008
Location: Gainesville Ga
Posts: 210
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5.7 mounting question
I have a 1996 5.7 engine I am trying to place in my 71-72 frame. I tried to set it down in the frame today, and the stock manifolds hit the frame before the mounts will sit down on the mount stands. Ive never tried to put a vortech in this year truck but know it can and has been done. The mounts look like they will line up if the manifolds were removed, allowing the engine to go down. Also what crossmembers will need to be removed, relocated or added to accomodate 5.7/ L460e? Thanks for your time!
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#2 |
Senior Member
Join Date: Aug 2006
Location: Minnesota
Posts: 943
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Re: 5.7 mounting question
Are you motor mounts correct for that year sb. What was in the truck before? The 6cyl and 8cyl mount towers that go from the frame to the crossmember are different.
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#3 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: 5.7 mounting question
you just need to get the correct manifolds for a 67 - 72 4X4, or headers.
The tranny cross member will need moved... that's it. |
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#4 |
Registered User
Join Date: Sep 2008
Location: Gainesville Ga
Posts: 210
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Re: 5.7 mounting question
the frame im using was a 6 cyl truck. I already changed the mount towers and believe they are correct. I looked at a friends 72 with a 350 in it and the towers im using look like his. I just pulled the mounts off one of the old inline 6cyls i have and they bolted on the vortec, but Im wondering if the mount height is the difference. thanks
Last edited by Larry S; 11-17-2008 at 10:40 PM. |
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#5 |
Registered User
![]() Join Date: Aug 2008
Location: Sunny Arizona
Posts: 525
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Re: 5.7 mounting question
Larry, I will be following this one, I am doing the same exact thing. My engine and trans is the exact same year you are installing. A write up with pics would be nice.
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Nick "Everyone has a plan, 'till they get punched in the mouth".........Mike Tyson 1968, GMC, SWB, Project 1972, GMC, LWB, Daily Driver, 383, headers, 2.5"/3" exhaust, 200r4, 3.5/5 ECE components. 1972, C/10, LWB, 350 vortec, th350 |
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#6 |
Registered User
Join Date: Sep 2008
Location: Gainesville Ga
Posts: 210
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Re: 5.7 mounting question
Ok. Im going to get some new correct mounts for the 5.7. The ones I stuck on there are a "lil hairy" but Im thinking the manifolds are the problem. If the manifolds werent on there it looks like it would sit right in. Will a set of headers off 67-72 350 fit 1996 5.7? Thanks
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#7 |
Registered User
![]() Join Date: Aug 2008
Location: Sunny Arizona
Posts: 525
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Re: 5.7 mounting question
yes
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Nick "Everyone has a plan, 'till they get punched in the mouth".........Mike Tyson 1968, GMC, SWB, Project 1972, GMC, LWB, Daily Driver, 383, headers, 2.5"/3" exhaust, 200r4, 3.5/5 ECE components. 1972, C/10, LWB, 350 vortec, th350 |
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#8 |
Registered User
Join Date: Sep 2008
Location: Houma LA
Posts: 193
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Re: 5.7 mounting question
Please keep all ads in the classified sections only.
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1968 GMC Rebuilding Stage ![]() 2001 Camaro SS SOLD ![]() Last edited by Liz; 11-18-2008 at 09:04 AM. Reason: fs |
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#9 |
Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: 5.7 mounting question
Meh, headers are just a good way of ruing starters and keeping yourself busy chasing exhaust leaks. Keep the later model exhaust manifolds. I just finished a similar deal into a ’72 and wanted to keep the EFI manifolds for the sake of keeping the O2 sensor in the manifold rather than putting an O2 bung in the exhaust pipe. I ended up using 1976 engine towers to clear the exhaust manifolds.
Thread here…. http://67-72chevytrucks.com/vboard/s...d.php?t=306106
__________________
Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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#10 |
Registered User
![]() Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,522
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Re: 5.7 mounting question
Longhornman nailed it. The later style drop down manifolds won't work in these trucks. You need ram horn manifolds or headers.
Last edited by mr48chev; 11-18-2008 at 01:34 AM. |
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#11 |
Registered User
Join Date: Oct 2003
Location: Sunny, Florida, some might call it South Alabama
Posts: 834
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Re: 5.7 mounting question
I have a 98 Vortec 350 and 700r4 in my truck. It sits in it just like an older 350 and TH350. But you have to cut the brace out that the I6 mounted to, and you are also gonna need to put a auto steering column in your truck. I didn't recieve the stock manifolds with my motor so I just bought a good set of headers
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Just sold my C10...sad day... Looking for a 1972 Blazer to hopefully fill the hole in my heart. |
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