350 vs 700r4 length - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74 stepside · 08-13-2012, 12:41 PM

I tried the search before I asked, but couldnt find an answer. My 74 shortbed originally came with a 350/350 combo. They are both long gone now. I have a 400 to install but now might be trading it for a 700r4. Im guessing my 350 had a 9" tail shaft but not sure. Am I going to need to lengthen or shorten my drive shaft?? Is the column shift brackets going to adapt or do I need them from an 80s truck?? Thanks for any info, Matt.

bigblock73 · 08-13-2012, 12:46 PM

my 73 C10 came with a th350, I swapped a 700 in, the drivesahft did not need to be shortened at all.

Can't help on the linkige part, I am running a floor shifter.

rs72z · 08-13-2012, 12:53 PM

Drive shaft and the linkage will both work.

Rich84 · 08-13-2012, 01:45 PM

You do have to move the cross member..

74 stepside · 08-13-2012, 05:27 PM

Well if my stock driveshaft will work that will save me some coin. Thanks for the info.

Jonboy · 08-13-2012, 06:17 PM

My '74 had the long tailshaft, and the 700R4 went right in. I did have to move the crossmember, like Rich mentioned. Not an issue at all. Driveshaft and linkage works like a charm.

406 Q-ship · 08-13-2012, 06:31 PM

If your truck had a long shaft TH350 then you don't need to do anything, the driveshaft slip right in. How do I know, my 1974 was an original TH350 (they originally came with long shafts) and I put in a 700R4 and used the original drivesaft.

74 stepside · 08-13-2012, 07:12 PM

I dont remember if my 350 was a long tail or not. Does one of you have a measurement of the driveshaft?

clinebarger · 08-13-2012, 08:50 PM

A "short tail" TH350's extention housing is roughly 6" long.

A "long tail" TH350's extention housing is roughly 9" long.

74 stepside · 08-14-2012, 12:45 AM

Quote:

Originally Posted by clinebarger

A "short tail" TH350's extention housing is roughly 6" long.

A "long tail" TH350's extention housing is roughly 9" long.

As I stated above I dont have the trans anymore so I cant measure it. Thats why I asked the length of driveshaft.

beamn7 · 08-14-2012, 01:57 AM

Linkage should work just fine. Just need to change the indicator in the dash. Easy swap.

gchemist · 08-14-2012, 07:47 AM

Transmission mounting and housing sizes.
http://www.tciauto.com/tc/trans-dim

406 Q-ship · 08-14-2012, 01:38 PM

Quote:

Originally Posted by 74 stepside

As I stated above I dont have the trans anymore so I cant measure it. Thats why I asked the length of driveshaft.

If you can wait a bit I can slide under my truck and measure the driveshaft on my truck.

74 stepside · 08-14-2012, 01:59 PM

Quote:

Originally Posted by gchemist

Transmission mounting and housing sizes.
http://www.tciauto.com/tc/trans-dim

Cool link, thanks.

74 stepside · 08-14-2012, 02:00 PM

Quote:

Originally Posted by 406 Q-ship

If you can wait a bit I can slide under my truck and measure the driveshaft on my truck.

That would be cool, thanks.

74 stepside · 08-14-2012, 02:02 PM

Quote:

Originally Posted by beamn7

Linkage should work just fine. Just need to change the indicator in the dash. Easy swap.

Do you know where I can get the new indicator besides a wrecking yard?

INSIDIOUS '86 · 08-14-2012, 02:21 PM

Quote:

Originally Posted by 74 stepside

Do you know where I can get the new indicator besides a wrecking yard?

Neighbors truck?

Posted via Mobile Device

beamn7 · 08-14-2012, 03:10 PM

Quote:

Originally Posted by INSIDIOUS '86

Neighbors truck?

Posted via Mobile Device

If that option doesn't pan out, LMC truck (cheapest) has them along with a few others.

On Ebay:
http://www.ebay.com/itm/GMC-C-K-R-V-...item53ec2202a7

Classic Industries:
http://www.classicindustries.com/truck/parts/17140.html

LMC:
http://www.lmctruck.com/icatalog/cc/full.aspx?Page=136

(It says it is for later models than yours but that is only due to the availability of the 700, it will mount just fine with no mods)

Or, Yes, Junkyard but if you are like me, you most likely will leave the junkyard with it and a host of other parts you found and an empty wallet....

rcsweet21 · 08-14-2012, 04:14 PM

i dropped a built 1966 327 ci engine with a 1997 4l60e in a 1986 c-10 that had a 305 ci and a th350 and all I had to do was move the cross member and the shifter worked fine also

gchemist · 08-14-2012, 04:16 PM

Oh yea, rookies!!

http://transmissioncenter.net/700R4_Swap_Info.htm

08-13-2012, 12:41 PM	#1
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	350 vs 700r4 length I tried the search before I asked, but couldnt find an answer. My 74 shortbed originally came with a 350/350 combo. They are both long gone now. I have a 400 to install but now might be trading it for a 700r4. Im guessing my 350 had a 9" tail shaft but not sure. Am I going to need to lengthen or shorten my drive shaft?? Is the column shift brackets going to adapt or do I need them from an 80s truck?? Thanks for any info, Matt.

08-13-2012, 12:46 PM	#2
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: 350 vs 700r4 length my 73 C10 came with a th350, I swapped a 700 in, the drivesahft did not need to be shortened at all. Can't help on the linkige part, I am running a floor shifter. __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale Last edited by bigblock73; 08-13-2012 at 12:54 PM.

08-13-2012, 12:53 PM	#3
rs72z Registered User Join Date: Oct 2011 Location: Emory TX Posts: 900	Re: 350 vs 700r4 length Drive shaft and the linkage will both work. __________________ ___________________ 78 ccsb dually 5.3 4l60e http://67-72chevytrucks.com/vboard/s...d.php?t=491551

08-13-2012, 01:45 PM	#4
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,692	Re: 350 vs 700r4 length You do have to move the cross member..

08-13-2012, 05:27 PM	#5
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Re: 350 vs 700r4 length Well if my stock driveshaft will work that will save me some coin. Thanks for the info.

08-13-2012, 06:17 PM	#6
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: 350 vs 700r4 length My '74 had the long tailshaft, and the 700R4 went right in. I did have to move the crossmember, like Rich mentioned. Not an issue at all. Driveshaft and linkage works like a charm. __________________ 1974 Jimmy- 5.3/4L80e/NP241

08-13-2012, 06:31 PM	#7
406 Q-ship Registered User Join Date: Oct 2010 Location: Largo Florida Posts: 632	Re: 350 vs 700r4 length If your truck had a long shaft TH350 then you don't need to do anything, the driveshaft slip right in. How do I know, my 1974 was an original TH350 (they originally came with long shafts) and I put in a 700R4 and used the original drivesaft. __________________ Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle."

08-13-2012, 07:12 PM	#8
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Re: 350 vs 700r4 length I dont remember if my 350 was a long tail or not. Does one of you have a measurement of the driveshaft?

08-13-2012, 08:50 PM	#9
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 350 vs 700r4 length A "short tail" TH350's extention housing is roughly 6" long. A "long tail" TH350's extention housing is roughly 9" long.

08-14-2012, 01:57 AM	#11
beamn7 Registered User Join Date: Oct 2011 Location: Wildomar, CA Posts: 466	Re: 350 vs 700r4 length Linkage should work just fine. Just need to change the indicator in the dash. Easy swap.

08-14-2012, 07:47 AM	#12
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: 350 vs 700r4 length Transmission mounting and housing sizes. http://www.tciauto.com/tc/trans-dim __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

08-14-2012, 04:14 PM	#19
rcsweet21 Registered User Join Date: Feb 2011 Location: Abilene Kansas Posts: 18	Re: 350 vs 700r4 length i dropped a built 1966 327 ci engine with a 1997 4l60e in a 1986 c-10 that had a 305 ci and a th350 and all I had to do was move the cross member and the shifter worked fine also

08-14-2012, 04:16 PM	#20
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: 350 vs 700r4 length Oh yea, rookies!! http://transmissioncenter.net/700R4_Swap_Info.htm __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos



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