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06-10-2012, 03:07 PM
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#1 |
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Registered User
Join Date: Feb 2008
Location: Hickory, NC native, but stuck in Valdosta, Ga
Posts: 615
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454 engine
Found these number on the rear 3999289 GM 10 T or the first number could be a 8. What do u guys think it is? Didn't see any numbers on the front!!!!
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06-10-2012, 07:56 PM
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#2 |
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Registered User
Join Date: Jun 2004
Location: Beeville, Texas
Posts: 1,943
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Re: 454 engine
I found this on nasty28.com:
3999289 1972-78 454 215, 235, 240, 270, 2 bolt, car & truck
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RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck |
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06-10-2012, 08:42 PM
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#3 |
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Registered User
Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
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Re: 454 engine
That's actually one of the preferred castings. They rarely have any problem going .100 over, most will go .125 over and still have enough cylinder wall thickness for good ring seal. If it's a 4-bolt, it's about as strong of a production casting as GM made, a preferred starting point for an engine that can be run hard. Really hard.
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06-10-2012, 09:15 PM
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#4 |
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72 BB C30 Super LongHorn
 
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Re: 454 engine
BBC block castings up to the year 1978 had more metal throughout the castings.
After 1978, GM used less material in order to lighten up the block.
__________________
72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS 
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06-17-2012, 12:10 PM
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#5 |
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Registered User
Join Date: Feb 2008
Location: Hickory, NC native, but stuck in Valdosta, Ga
Posts: 615
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Re: 454 engine
I cleaned it up yesterday and found these numbers!
1- Heads 9364 C 2-Front of block: T0111 TRH (one number had A dash under it, the second one (1) I think! |
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