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Author Topic: would a factory 78 c20 a/c system work in a 77 c10?  (Read 2613 times)

Offline nickjones810

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would a factory 78 c20 a/c system work in a 77 c10?
« on: November 02, 2014, 11:42:07 am »
Would it work? Is it worth getting an old factory one? A guy wants $150 for supposedly everything.
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Offline zieg85

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    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: would a factory 78 c20 a/c system work in a 77 c10?
« Reply #1 on: November 02, 2014, 12:53:08 pm »
Lot of work switching it over especially if your truck did not come with factory AC.
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline hatzie

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Re: would a factory 78 c20 a/c system work in a 77 c10?
« Reply #2 on: November 02, 2014, 05:16:48 pm »
GM changed from TXV to orifice valve systems in the late 1970s.  TXV is less adaptable to non R12 refrigerants.  Either system can be used as long as you have an AC firewall.

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