Found Another 61 Block

oldskydog

Well Known Member
Supporting Member 10
I just got home from rescuing another early 61 409 historiccal artifact. Here's a few pics with more later after I get it unwrapped. It's date casted 12 November, 1960 three days before my other block which was 15 Nov and the Dan Gurney block was 16 Nov. All 3 examples were cast on the GM2 conveyor at Tonawanda and they all bear the same characteristics of the ground out and stamped 3795623 casting numbers as well as the four "X"s cast under the top of the bellhousing mounting flange, the small "L" stamped on the drivers side front of the block in the area where the "X" would later appear on the CFD blocks.
The really great thing about this example is the assembly stamp of T0207Q which is interesting to note the time between casting and assembly with the official production availability of the engine in early Feb, 61. It shows an original bore with about .007 wear and sleeves in two cylinders......It was magged but need to get it sonic checked to verify the cylinder wall thickness.


61 409 i.jpg61 409 h.jpg61 409 e.jpg61 409 f.jpg61 409 d.jpg61 409 c.jpg
 
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rstreet

Well Known Member
Supporting Member 17
I often wondered what my 61 real SS with 61 409 would be worth if it were to be disassembled and sold by pieces. Remember all brightwork is NOS as well as two fenders. Back glass was not NOS as well as brake drums are SS but not NOS
Robert
 

TheLRZ

Well Known Member
I just got home from rescuing another early 61 409 historiccal artifact. Here's a few pics with more later after I get it unwrapped. It's date casted 12 November, 1960 three days before my other block which was 15 Nov and the Dan Gurney block was 16 Nov. All 3 examples were cast on the GM2 conveyor at Tonawanda and they all bear the same characteristics of the ground out and stamped 3795623 casting numbers as well as the four "X"s cast under the top of the bellhousing mounting flange, the small "L" stamped on the drivers side front of the block in the area where the "X" would later appear on the CFD blocks.
The really great thing about this example is the assembly stamp of T0207Q which is interesting to note the time between casting and assembly with the official production availability of the engine in early Feb, 61. It shows an original bore with about .007 wear and sleeves in two cylinders......It was magged but need to get it sonic checked to verify the cylinder wall thickness.


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Super Sick
 

1964SuperStocker

Well Known Member
Supporting Member 3
The cast numbers vs the stamped numbers is interesting. Why would GM ever do that? They had already made thousands of 348 castings and never did that.
 

oldskydog

Well Known Member
Supporting Member 10
Not that unusual. If the numbers inserted into the pattern were wrong there was no way to tell until after the casting was cooled off and removed from the mold. Remember, the 409 was not supposed to come out until 62 so the 61 was a last minute response to the other manufacturers coming out with the bigger engines in early 61. Apparently they didn't want to disturb the 62 409 project that was already underway so they took the 348 mold patterns, replaced the core with thicker walls and pulled a new part number for it. Probably someone forgot to change the 348 011 part number in the holder to the new part number 3795623. Possibly they poured the first run without having the new number assigned and corrected them after the fact.
 

GreenEyez93274

Well Known Member
There one locally for sale. Just popped up like 2 weeks ago.
 

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