Decoding engine casting numbers- first timer

[msg]

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

[aerotruk63]

There's some info in the FAQ section if you'd like to look.

[60-66]

TJH is the suffix for a 1973 Chevy truck 350 with a manual trans. This was in my 1973-1976 Chevy truck parts book. After 1970 they went to the 3 letter suffix code. Also that casting number ending in 010 is a 350 block.Jon

[60-66]

Your Intake manifold is a Rochester 4 barrel From a 1966 327 Impala according to the book Chevrolet by the numbers. Jon

[msg]

Thanks Jon!

I was looking through the FAQ's and saw all this for the Casting number I have:

3970010 350 69 Corvette late 69,4 bolt main
3970010 302 69 Camaro Z/28,Late 69, 4 bolt main
3970010 350 69-79 Truck 2&4 bolt main
3970010 350 69-79 Pass,Chevelle,Camaro,Nova,Monte Carlo 2&4 bolt main
3970010 350 70 Corvette 300,350,370 HP 4 bolt main
3970010 350 71 Corvette 270,330 HP 4 bolt main
3970010 350 72 Corvette 200,255 HP 4 bolt main

So the 1973 year matches up with what you provided, but is the number I have under the distributor E236 mean May, 23, 1976?

[60-66]

No, not exactly, the intake as I stated in my second post is from a 1966 Impala so the 6 is for 1966. Dates on 1970 and up castings will be 73 or 76. Your block could be an early casting, part of the 1973 production year and be a 72 with the month and day making it part of the 1973 production year. It will be back by the casting number of the block I think on the other side. Judging by the machine date 05 = May 07 =Day it will be 73 though.

[msg]

I see now, I thought it was the engine casting date and didn't realize the intake manifold was from a 1966 327 Impala. Great to know where all of these parts are from.

I'll keep looking for the engine casting date, but knowing that the engine is a 350 from a 1973 truck says alot. The manual transmission you mentioned associated to this engine makes me wonder if that is why the powerglide is having issues leaking and that there is a linkage that is not hooked up to a rod or cable. Over the years two transmission shops have told me that the leak can not be stopped for some reason, but I'll get another thread going on that.




I really appreciate your help on this Jon!

[60-66]

Well, the trans really has nothing to do with the engine as far as leaking or linkage. Power glides, all of mine leak , LOL. Especially if they sit a long time. Hey, Welcome to the group and NICE truck ! Jon