switching a 1975/203 to a 1980/205 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pound41 · 03-05-2023, 09:29 PM

Hello looking at switching a my 1975 K10 with a 203 to a 1980/205 would there be any issue or should everything bolt up.
Thanks

**Getter-Done** · 03-05-2023, 11:13 PM

Couple of links for you.

It has been years since I have studied this.

Kipps will probably chime in with the Answer

**kwmech** · 03-06-2023, 01:27 AM

As long as you have the correct adapter for the swap and maybe the spline sleeve depending on which transmission you have

pound41 · 03-06-2023, 08:48 AM

Its a 205 from a 350 going on to my 350 that was mated to the 203. I think they both are 27 spline. Not sure if 32 spline ever made it in a 350

**kwmech** · 03-06-2023, 09:39 AM

Nope, 27 spline only

pound41 · 03-07-2023, 07:58 PM

If a 205 doesn't have the ID plate are there any other markings or cast numbers that will help Identify the year etc. Thanks

wazzabie · 03-14-2023, 03:10 PM

you may need to change driveshaft lengths

03-05-2023, 09:29 PM	#1
pound41 Registered User Join Date: Dec 2002 Location: Northern Virginia Posts: 1,268	switching a 1975/203 to a 1980/205 Hello looking at switching a my 1975 K10 with a 203 to a 1980/205 would there be any issue or should everything bolt up. Thanks

03-05-2023, 11:13 PM	#2
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 8,413	Re: switching a 1975/203 to a 1980/205 Couple of links for you. It has been years since I have studied this. Kipps will probably chime in with the Answer Link: https://www.4wheelparts.com/b/advanc...rs/_/N-1z0alil Link: https://torqueking.com/category/1973...transfer-case/ __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

03-06-2023, 01:27 AM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,634	Re: switching a 1975/203 to a 1980/205 As long as you have the correct adapter for the swap and maybe the spline sleeve depending on which transmission you have

03-06-2023, 08:48 AM	#4
pound41 Registered User Join Date: Dec 2002 Location: Northern Virginia Posts: 1,268	Re: switching a 1975/203 to a 1980/205 Its a 205 from a 350 going on to my 350 that was mated to the 203. I think they both are 27 spline. Not sure if 32 spline ever made it in a 350

03-06-2023, 09:39 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,634	Re: switching a 1975/203 to a 1980/205 Nope, 27 spline only

03-07-2023, 07:58 PM	#6
pound41 Registered User Join Date: Dec 2002 Location: Northern Virginia Posts: 1,268	Re: switching a 1975/203 to a 1980/205 If a 205 doesn't have the ID plate are there any other markings or cast numbers that will help Identify the year etc. Thanks

03-14-2023, 03:10 PM	#7
wazzabie Registered User Join Date: Dec 2011 Location: WA Posts: 378	Re: switching a 1975/203 to a 1980/205 you may need to change driveshaft lengths



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