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Old 02-10-2013, 05:26 PM   #1
msg
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Join Date: Feb 2013
Location: GA
Posts: 1,325
Decoding engine casting numbers- first timer

The engine in my 66 C-10 is I believe a 350 from what I have been researching, but I figure ask those who know.

I finally located the numbers struck onto the block and there were 2 sets of numbers.
They were stamped onto the passenger side (facing front of motor) on a ledge just infront of the valve cover.

It reads like so:

C5A146997 V0507TJH

From the info I could find after searching online I got the 2nd portion semi decoded from this site
http://www.thedirtforum.com/gmcastin...rlocations.htm

V= Flint Plant
05 = May
07 =Day
T = Truck?
but the JH part I couldnt find info on the site listed above

This site mentioned the suffix code on this page
http://www.nastyz28.com/gm-chevy-cod...s-suffix-7.php

but there were 2 entries for TJH and the years were 73 and 76, both showed a 350 type so I am pretty sure its a 350 but from what? Maybe it doesnt matter a bunch but as I try to get the drive line figured out it might be handy to know.

I also was able to reach in and get an imprint of what's stamped onto 2 areas on the engine flange near the bell housing.





There were also numbers on top of the engine right in front of the distributor



And this one just down in front of the distributor E236



And this one directly in front of the carb with the firing order if it helps



Trying to learn what these numbers are referring to (except firing order) and to double check my research and ask the pros here.

Sean
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