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.

 

from www.mortec.com


3951511........400...70-73...4 bolt main caps...Some replacement blocks had 2-bolt main caps

 

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.

 

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?

 

No, it was originally in a B body, Impala for example.

 

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.

 

CSA is a car app


http://www.nastyz28.com/gm-chevy-cod...s-suffix-3.php
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CSA 1973 400 tur hydro trans. LE2 U 175 2 B
CSA 1976 400 LT4 U 175 4 A/Bel Air/Kingswd

 

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.