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Old 11-19-2019, 03:58 AM   #1
desert-rat
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Help with decoding my engine.
Got this engine but not sure the cubic size. Checked the casting number and comes back as a 302, 327, and 350. I took pictures of different numbers on the block. I'm hoping for a 350. Please help before I tear into this motor. Thanks.
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Old 11-19-2019, 06:35 AM   #2
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Re: Help with decoding my engine.
It’s most likely a 350. Best to pull a cylinder head and measure.
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Old 11-19-2019, 06:54 AM   #3
Lanman1972
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Re: Help with decoding my engine.
This site lists as 1975 350 for the TYX suffix.

http://www.1968ss.com/sbcsuffix.asp
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Old 11-19-2019, 01:43 PM   #4
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Re: Help with decoding my engine.
010 blocks are supposed to be good!
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Old 11-19-2019, 08:55 PM   #5
desert-rat
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Re: Help with decoding my engine.
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Originally Posted by aerotest View Post
It’s most likely a 350. Best to pull a cylinder head and measure.
That is an option but I wanted to know for sure before I start pulling things off.
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Old 11-19-2019, 08:56 PM   #6
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Re: Help with decoding my engine.
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Originally Posted by Lanman1972 View Post
This site lists as 1975 350 for the TYX suffix.

http://www.1968ss.com/sbcsuffix.asp
Awesome! Great information. Happy to know it is a 350.
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Old 11-19-2019, 08:56 PM   #7
desert-rat
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Re: Help with decoding my engine.
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Originally Posted by cypressbog View Post
010 blocks are supposed to be good!
What does that number mean?
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Old 11-24-2019, 04:23 AM   #8
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Re: Help with decoding my engine.
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Originally Posted by Lanman1972 View Post
This site lists as 1975 350 for the TYX suffix.

http://www.1968ss.com/sbcsuffix.asp
Great 411. But for application it reads "conv.cab" Is that conventional cab?? Like meaning a single cab?? Thanks.
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Old 11-24-2019, 10:28 AM   #9
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Re: Help with decoding my engine.
They've pretty much all got the 010 cast in to them.

3790010 is the most common and mass produced 4" bore block GM ever made. about 90% of them are 350's. Some early ones might be 327's. The odds of it being a 302 are slim to none.

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