Casting # ID

[Skip FIx]

OK guys digging through and looking at casting numbers on some stuff:

I have a RH exhaust manifold that came with some 348 stuff 3743306 I can not find in the list here on what it decodes to. It came with a 3732793 LH that is a 58-61 250 -280 HP manifold. Heads that came with the set are 3758379s which are 59-61 250-280 HP one is an E1661 and the other a B26 59 so not a matched pair. Came also with a date J3057 tripower, I missed the casting # on it.

I was also digging at my flywheels and had a 3714465 I think is my old 64s flywheel. But can't find a source for flywheel codes. It has a GM7 and a K78 on it also.

Also my extra 409 block is a 3844422 T0326 QC I know I pulled from a 63. It has a March 26 stamped date and a CFD and a Julian 73(March 13) for date code. So the Stamp code and the Julian code are different.

 

[oldskydog]

OK guys digging through and looking at casting numbers on some stuff:

I have a RH exhaust manifold that came with some 348 stuff 3743306 I can not find in the list here on what it decodes to. It came with a 3732793 LH that is a 58-61 250 -280 HP manifold. Heads that came with the set are 3758379s which are 59-61 250-280 HP one is an E1661 and the other a B26 59 so not a matched pair. Came also with a date J3057 tripower, I missed the casting # on it.

I was also digging at my flywheels and had a 3714465 I think is my old 64s flywheel. But can't find a source for flywheel codes. It has a GM7 and a K78 on it also.

Also my extra 409 block is a 3844422 T0326 QC I know I pulled from a 63. It has a March 26 stamped date and a CFD and a Julian 73(March 13) for date code. So the Stamp code and the Julian code are different.

The 306 exhaust manifold is a 348 truck RH manifold without any choke stove provision.
Somewhere, I think I have flywheel numbers, but I'll have to look.
It's possible that the 422 block came into production in late 63, but also possible that it was a replacement engine installed in the 63 you took it out of. The only way to tell for sure would be if the VIN derivative on the pad matched the 63's VIN. As for the dates, the julian date is the casting date....the stamped date is the assembly date.
:

 

[oldskydog]

Skip,
Check that flywheel casting number again. I'll bet it's really 3714463 which is a 168 tooth flywheel for 55-58 with headvy duty (11 " ) clutch. The casting date of Nov 7, 58 indicates it may have also been used in 59 production or for service.:

 

[Skip FIx]

Cecil thanks Pretty sure on the flywheel # but I'll double check this week. I was sweating like a pig in the storage space in those high 90s maybe 100 today. Maybe had some sweat in my eyes. Pretty sure it was the one on my old 64 340 HP motor.

So what years had Julian casting dates as the chart here just shows normal dates on the pictures.

I have two sets of 690s one with Julian dates and the other has regular casting dates. The 690's are in different spots on the head too. K2561,L2161, and 278,270.

My 656 block that is the stroker build now is a 308 Julian date.

 

[oldskydog]

Cecil thanks Pretty sure on the flywheel # but I'll double check this week. I was sweating like a pig in the storage space in those high 90s maybe 100 today. Maybe had some sweat in my eyes. Pretty sure it was the one on my old 64 340 HP motor.

So what years had Julian casting dates as the chart here just shows normal dates on the pictures.

I have two sets of 690s one with Julian dates and the other has regular casting dates. The 690's are in different spots on the head too. K2561,L2161, and 278,270.

My 656 block that is the stroker build now is a 308 Julian date.

Julian casting dates started sometime in 62 when casting shifted to the CFD foundry. In short, if it is a CFD casting, it will have a julian casting date, an X on the front, and armasteel main caps.

 

[hogmotors]

Skip,
You gonna use that flywheel on your stroker?
I'm a big fan of the GM 15# nodular iron flywheel.

HEY, remember, for us, it's NEVER HOT ENOUGH!! It feels like $'s!!

 

[Skip FIx]

Gordon-NOPE!!! Just digging through old stuff, maybe to get to someone who would need it. Even my old Impala in the 70s had a Hays "blowup proof" flywheel and clutch and a scattershield.