Swap question! vortec 350(5.7) and 700r4 into 68 lwb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BIGBLU 72 · 08-26-2009, 10:48 AM

Im thinking about swapping a Vortec 350 from a 97 Tahoe and a 700r4 into my 68 LWB. I know that this has been done so im looking for information about the swap and any problems/tricks that you all know of so that this sway goes easy.

I am also considering keeping the TH-400 in the truck thats in it now but adding an overdrive. Any upsides or downsides to this trans options?

any thought greatly appreciated

BIGBLU 72 · 08-26-2009, 03:59 PM

anybody?

smoky02 · 08-26-2009, 05:23 PM

it's extremely easy and straight forward, that is exactly what I'm running in mine right now. You will need to slide the cross member back. And you will also need to find a lock up system that you like, and also shorten the drive shaft. But other than that it's extremely easy. P.S. If you are going to use the fuel injection that is a little bit trickier, but still not hard at all.

Ackattack · 08-26-2009, 05:40 PM

are you going to use a 700r4, or a 4l60e that comes behind it?

If you keep the fuel injection, then the computer for that will also run the shifting for the 4L60E.

Putting an OD unit on a TH400 will be way more expensive than a OD tranny.

08-26-2009, 10:48 AM	#1
BIGBLU 72 Registered User Join Date: Dec 2008 Location: Ashland, KY Posts: 700	Swap question! vortec 350(5.7) and 700r4 into 68 lwb Im thinking about swapping a Vortec 350 from a 97 Tahoe and a 700r4 into my 68 LWB. I know that this has been done so im looking for information about the swap and any problems/tricks that you all know of so that this sway goes easy. I am also considering keeping the TH-400 in the truck thats in it now but adding an overdrive. Any upsides or downsides to this trans options? any thought greatly appreciated __________________ 68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD

08-26-2009, 03:59 PM	#2
BIGBLU 72 Registered User Join Date: Dec 2008 Location: Ashland, KY Posts: 700	Re: Swap question! vortec 350(5.7) and 700r4 into 68 lwb anybody? __________________ 68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD

08-26-2009, 05:23 PM	#3
smoky02 Registered User Join Date: Oct 2003 Location: Sunny, Florida, some might call it South Alabama Posts: 834	Re: Swap question! vortec 350(5.7) and 700r4 into 68 lwb it's extremely easy and straight forward, that is exactly what I'm running in mine right now. You will need to slide the cross member back. And you will also need to find a lock up system that you like, and also shorten the drive shaft. But other than that it's extremely easy. P.S. If you are going to use the fuel injection that is a little bit trickier, but still not hard at all. __________________ Just sold my C10...sad day... Looking for a 1972 Blazer to hopefully fill the hole in my heart.

08-26-2009, 05:40 PM	#4
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Re: Swap question! vortec 350(5.7) and 700r4 into 68 lwb are you going to use a 700r4, or a 4l60e that comes behind it? If you keep the fuel injection, then the computer for that will also run the shifting for the 4L60E. Putting an OD unit on a TH400 will be way more expensive than a OD tranny. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index



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