440 Engine numbers decoding

[Good old blightly]

Hi All,
Just joined, I'm from England.

Looking for some info on a couple of 440 engines.

Over here they are very rare to come across,
Been offered a 1968 440 block.

But I cannot identify it, owner claims it came from a 68 charger.
Engine casting number is right.
The engine block serial number is PT440P23736050,
PT points to coming from the right plant, Trenton
The P after the 440 I didn't think the engine should have a letter there.
Have been told if it had an S in the engine number means Hi performance, but a P perhaps Police??

Front pad is D440 =68, date code looks right.

But top of picture by drilling looks like a C, could be LC (low compression) was told a wrong way round C could indicate 6 pack block but no HP stamp on pad?

The owner is a few hundred miles away so not easy to pop over to look at, and he is not a car man.

Was it only the RT 440 stamped HP and the standard charger440 not stamped HP?

I Have a 68 RT charger, it was a one owner from Texas.
It Came to England back in the late 80s.

My Charger had an block swap before it came here, it's got a 1970 440 in it non HP. Carb heads etc correct 68

so was looking at this block as it's a 68.

Just trying to decide if it's worth getting and maybe swapping in the future as unlikely to see one over here again. Or just keep my 1970 block.


It's hard to decode you read one thing on the net then something contradicts it and your back at square one.

Few books I have don't really break it down enough.

And as you can appreciate these cars and blocks are rare over this side of the pond.

Any help ideas would be great

Thanks all

[Good old blightly]

Having problems uploading picture, bear with me Thanks

[Good old blightly]

picture of pad

[Good old blightly]

engine number

[Alaskan_TA]

D - series (model year) 1968

2373 - Final assembly date for the engine assembly - Jan 25, 1968

P - Premium Fuel recommended.

Sideways this, sideways that - meaningless.

No six packs until the following model year.

Some more info at http://www.hamtramck-historical.com/images/TSBs/1968/D68-25-1%20page6.jpg

& http://www.hamtramck-historical.com/images/TSBs/1968/D68-25-1%20page7.jpg

You can also ask him to check for another number stamped on the rear top of the bellhouse mounting flange.

[Good old blightly]

Hi, thanks that clears up a few issues.

Have you the same pages for 1970.

[Alaskan_TA]

Sure do.

The engine number details in the factory TSBs are normally in Chapter 25 & one of the first ones listed.

1970 Dodge TSB index at http://www.hamtramck-historical.com/1970-Dodge-TSB-Index.shtml

[69CoronetRT]

picture of pad

No HP = from a C body, not a Charger.

As stated above, ask if there is a VIN stamped on the rear flange by the oil sending unit.

[alfaitalia]

I've never been offered a 440 in the UK that did not come from a Jenson Interceptor...despite what the seller was saying! Lol.