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Old 12-20-2016, 12:09 PM   #1
iTrap911
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68 gmc 2500 super custom

Can anyone help me find out what engine is in my truck,plz?
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Last edited by iTrap911; 12-20-2016 at 12:18 PM.
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Old 12-20-2016, 01:24 PM   #2
iTrap911
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Re: 68 gmc 2500 super custom

3961478 is the full casting number
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Old 12-20-2016, 01:37 PM   #3
GASoline71
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Re: 68 gmc 2500 super custom

327 with probably a Powerglide transmission.

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

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I would never rebuild a 305.
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Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
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Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
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Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
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Old 12-20-2016, 03:27 PM   #4
iTrap911
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Re: 68 gmc 2500 super custom

Thank you for your insight, i was under the impression that it is 350,but idk
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Old 12-21-2016, 04:28 PM   #5
GASoline71
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Re: 68 gmc 2500 super custom

Suffix code "YH" = 1967 327 Powerglide,A.I.R. - 220hp 4bbl C-10 to 35

However, what is the full casting number... your pic cuts part of it off.

Gary
__________________
'cuz chicks dig scars...

My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
Quote:
Originally Posted by cableguy0 View Post
Its cheaper to listen to advice given when you ask for help than it is to ignore everyone and wait for carnage.
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Old 12-21-2016, 08:29 PM   #6
iTrap911
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Re: 68 gmc 2500 super custom

Thanks for your help, the casting number is 3961478, i was told when I bought it that it is a 350,but i don't really know.
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