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Old 09-13-2003, 06:41 PM   #1
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Block ID numbers?

I just bought a 400 small block, and would like to know what year it is, can anybody help me.

one side has these numbers: 13c162735

T1215CSA

on the other side: GM 3951511 or H.



anybody that can help me out i'd really appreciate it.
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Old 09-13-2003, 07:13 PM   #2
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from www.mortec.com


3951511........400...70-73...4 bolt main caps...Some replacement blocks had 2-bolt main caps
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Old 09-13-2003, 07:34 PM   #3
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Congratulations, you are now the proud owner of a 175hp 400sbc.

j/k, with that casting number and the stamping it is a 73

1973 CSA 400 tur hydro trans. LE2 U 175 2 B
http://www.nastyz28.com/sbchevy/spcode3.html

Dec 15th to be exatct.
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Old 09-14-2003, 08:32 PM   #4
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So is this out of a truck? if so what kind of truck? My block does have the 2 bolt caps, I wanted it that way so I could put splayed billet caps. I guess this should be a good foundation for a fun motor?
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Vrbancic Brothers Procharged 406
781.5 HP @ 6500
701 @ 5500
14 psi.
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Old 09-14-2003, 09:49 PM   #5
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No, it was originally in a B body, Impala for example.
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Old 09-15-2003, 03:18 PM   #6
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I went to a website that has a listing of numbers, and I cross refrenced the gm 3951511. and it said 1970 to 1973 truck with two bolt main. Which makes sense because the guy I bought it from said he thought it was from a truck.
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Vrbancic Brothers Procharged 406
781.5 HP @ 6500
701 @ 5500
14 psi.
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Old 03-29-2007, 09:30 PM   #7
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Re: Block ID numbers?

CSA is a car app


http://www.nastyz28.com/gm-chevy-cod...s-suffix-3.php
\

CSA 1973 400 tur hydro trans. LE2 U 175 2 B
CSA 1976 400 LT4 U 175 4 A/Bel Air/Kingswd
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Old 03-29-2007, 11:04 PM   #8
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Re: Block ID numbers?

That's a good site to use for future reference. I junked that small block 400 a while back and stepped up to a new DART little M. Thanks for the info though.
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This will give you an Idea.

http://www.cardomain.com/ride/2368130/1

Vrbancic Brothers Procharged 406
781.5 HP @ 6500
701 @ 5500
14 psi.
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1997, 2002, 350, 3951511, 400, block, chevy, csa, gm, id, motor, number, numbers, small, transmission, turhydro, vin
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