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Discussion Starter #1
My engine only has a "FG" stamp on the front of the passenger side head behind the alternator. Nothing else. I also found a small tag behind the distributor that appears to be screwed on that reads "0236". So far these are the only markings that I can find. I can't find any help on the internet searching for this. Any thoughts?
 

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Your signature says you have a 1970 Nova 350/4speed. Is this the car you're talking about? Original engine to the car? SS (300 HP) or a 250 HP L65?

B.
 

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Discussion Starter #3
Your signature says you have a 1970 Nova 350/4speed. Is this the car you're talking about? Original engine to the car? SS (300 HP) or a 250 HP L65?

B.
It is. Doubt it was an SS. Body tag confirms originally a V8 but I don't think this is an original engine. Previous owner confirmed it was a rebuilt 350 that was installed. Wondering if maybe the block was a crate engine or something.
 

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Yes, could be a crate or even a 350 from a truck or other GM car. All the 1970 Nova 350 engines had 3 letter suffixes that began with 'C'.

Bob
 

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Discussion Starter #5
Found a few more numbers on driver side rear. Believe this means 69-79 350?




1970 Nova 350/4spd
 

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Chevy By The Numbers shows this block as being used for 350 CID applications from April/May 1969 through 1975. It appears to have been used in just about every Chevrolet car model, including the Corvette. Also, extensive use in trucks.

Bob
 

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Discussion Starter #7
Chevy By The Numbers shows this block as being used for 350 CID applications from April/May 1969 through 1975. It appears to have been used in just about every Chevrolet car model, including the Corvette. Also, extensive use in trucks.

Bob
I was looking at the Nastyz28.com site and was finding similar info. Apparently the clock symbol represents the 2nd hour of the shift at the Saginaw plant that it was made at. Still trying to figure out what the NDT means or if that is even the correct order.
 

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i had to laugh...... but i knew guys that worked there 2nd. shift. an i'm betting that they set that clock at the beginning of the shift an never changed the time till it was end of shift. there was a couple bars across the street that brought a hole new meaning to brake time. it was atlest 130 degrees where they poured those blocks.
 
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"010" block so could be a 4-bolt main.
 
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66 Chevy II, 67 Chevy II, 65 C10
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FG is 69 327.
 

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Chevy By The Numbers shows this block as being used for 350 CID applications from April/May 1969 through 1975. It appears to have been used in just about every Chevrolet car model, including the Corvette. Also, extensive use in trucks.

Bob
FG suffix code should be a 69
 

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FG is 69 327.
Except this engine is a 010 block number, which were all 350 CID applications according to CBTN. I see the FG code listed in 1969 as a 327 passenger car with police equipment.

Bob
 

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That would be a welcomed surprise. Any idea what the NDT stamp on the rear of the block means?
I may be a shift marker indicator "N" = night, "D" = day, "T" = twilight.

Except this engine is a 010 block number, which were all 350 CID applications according to CBTN. I see the FG code listed in 1969 as a 327 passenger car with police equipment.
I have never come across an "010" block that was not a 350, but I could see GM using 350 blocks to fulfill 327 orders in 1969 at the end of the 327 run. And of course it could just be a mis-stamp or some other assembly line error.
 
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Discussion Starter #15
I may be a shift marker indicator "N" = night, "D" = day, "T" = twilight.



I have never come across an "010" block that was not a 350, but I could see GM using 350 blocks to fulfill 327 orders in 1969 at the end of the 327 run. And of course it could just be a mis-stamp or some other assembly line error.
The ndt reference would make sense to the shift marker. I tend to lean that this is indeed a 350 since the previous owner also believed it to be when it was rebuilt and the internals would have been selected for that intent. I could be wrong though.


1970 Nova 350/4spd
 

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010 block in 69 was 302, 327 and 350. He has a 69 327 block
 

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Discussion Starter #18
Seems like previous owner took an original 1969 327 and rebuilt it as a 350 with new internals, as well as being bored .040 over and zero decked. Totally viable outcome given the larger journal size in 69 327s. Only way to be 100% sure at this point would be to remove the oil pan and look at the crank shaft and the internals fully.

Not that concerned though. It runs strong either way. Guess I can start saying “got a cop motor” as mentioned previously. lol


1970 Nova 350/4spd
 

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EM3 is correct, my 69 302 is a 010 block. This was used into the 80’s as a 350 engine. My 79 Corvette had it.
 
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