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Old 03-02-2009, 10:45 AM
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sbc questions

I'm trying to find out what year my small block is, if anyone can help me.
Block cast # 3970010 motor code K02-17-ctl 121546888
Heads # 3986336
I'm trying to decide if I should rebuild this motor or look for something else?

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Old 03-02-2009, 11:21 AM
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Quote:
Originally Posted by polaristiger
I'm trying to find out what year my small block is, if anyone can help me.
Block cast # 3970010 motor code K02-17-ctl 121546888
Heads # 3986336
I'm trying to decide if I should rebuild this motor or look for something else?
010 blocks are heavy duty/high performance blocks they are always a great place to start building from.

Bogie
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Old 03-02-2009, 11:28 AM
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CTL 1970 350 4 spd trans. 300 4 Vette
CTL 1972 350 tur hydramatic L65 165 2 A F X
CTL 1975 400 LT4 U 175 4 B A
CTL 1978 305 LG3, a/t U 145 2 B
Since we know you have a 350, it`s either a 70 or 72. Look on the bellhousing of the block, in this area you`ll find the casting date code. It`ll look like this example: B 7 2
The B indicates the month, A - Jan B - Feb etc.
The 7 indicates the day of the month, the 7th.
The 2 indicates the year 2 - 1972.
Or the last digit could be 72, as some were cast like this.
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Old 03-02-2009, 12:34 PM
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The heads are from 71, with 76cc chambers. That's all I can find. They're probably pretty wheezy, but there are a few thousand head castings that will fit and perform.

010 blocks are great; thicker castings, and plentiful. They don't necessarily have the extra nickel that everyone claims they do, but that really doesn't amount to a hill of beans.
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