Engine number decode

[Sixt8Chrgr]

Can someone decode this please?

PT383R

Thanks

[69CoronetRT]

PT= Tenton engine plant
383 = CID
R= Regular fuel - probably a 2bbl block.

What are the next four numbers? That will tell you the engine assembly date.

[Ghoste]

Give us the next four and we can tell you when it was built (the engine that is).

[Sixt8Chrgr]

Here is the picture, but the number is PT383R23850836

I can't see the date code before the PT. Where can I find a 10,000 day calendar counter. I have looked and can't locate one. I discovered that the Mopar 10,000 day calendar began on July 29, 1961.

By the way this block is in my 68 Charger with a 4 BBL and a H in the fifth digit of the VIN.

Thanks,

[Ghoste]

2385 means it was built on February 7, 1968.

[Sixt8Chrgr]

Thanks.

[Sixt8Chrgr]

Was this probably a two barrel motor because of the "R" for Regular fuel? Would the 330 horsepower motor have a "P" where the "R" is in the above picture?

Thanks,