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confusing suffix code on 1970 L46

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Old Jun 18, 2009 | 05:27 PM
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Default confusing suffix code on 1970 L46

my 1970 l46 block is in storage, it is the correct 3970010 stamp on the rear , but the suffix code up front by the water pump reads K0510TBC.
this does not exist according to my black book. any clues? it also has a LT1 intake off a 1972 (3959594), which is strange but not a big deal.
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Old Jun 18, 2009 | 05:55 PM
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Originally Posted by pointy1
my 1970 l46 block is in storage, it is the correct 3970010 stamp on the rear , but the suffix code up front by the water pump reads K0510TBC.
this does not exist according to my black book. any clues? it also has a LT1 intake off a 1972 (3959594), which is strange but not a big deal.
TBC is a 1970 truck motor code
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Old Jun 18, 2009 | 06:02 PM
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TBC shows up here:

http://www.nastyz28.com/gm-chevy-cod...s-suffix-6.php
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Old Jun 18, 2009 | 06:42 PM
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1970 truck engine!, well at least its the right year. damn!
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Old Jun 18, 2009 | 08:22 PM
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This engine was cast and manufactured by McKinnon Industries in St. Catherines Ontario Canada on May 10. Year is not given.

Code was also used for trucks built in 1979.
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