Can someone identify my engine casting #? I can't seem to find any reference to my sequence and want to know if it's at least date-matched. Here it is: PT225R22430823 I have triple checked the numbers but can't seem to identify this particular casting. Any help is appreciated. The engine is in a 68 Barracuda.

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'68 Barracuda - taking advice on increasing street torque, power, & road handling. Click To See It

Well, other than it being a 225 I got nothing. :shrug:

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If it was easy, everybody would be doing it.

Thanks @coconuteater64, I appreciate you poking around.

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'68 Barracuda - taking advice on increasing street torque, power, & road handling. Click To See It

Slant Six Dan is the guru on this stuff - hopefully he will help ya out. If I remember correctly 225R is a passenger car engine. The month and day of casting should follow. I have numbers on heads - but those can be interchanged. So looks like ya have a car engine in a car. What big help I am! PM Dan.

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66 Lil' Red Piggie Valiant (Mater Crusher) - Thanks Zilla!!!!! 72 Demon (Number 1 Son's)

Dan could get this dialed in better, here is what I know:

PT= Trenton Engine Plant
225= 225 slant six
R=Regular Fuel

2243= Date Code (I think using the 10,000 day Chrysler Calender this is September 18, 1967)...

0283=Sequence Number

I like how "R" means regular fuel, but after about 50 years, that doesn't really mean the same thing any more....b

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Some of the other codes that are strictly very late 60's can be:

L or LC for low compression
P for Premium fuel (that would usually be "Ethyl" in those days)
S for Special Engine
HP for High Performance
HC for High Compression

(Note most of these don't apply to the slant six...)

Depending on placement in the sequence R,X,S a maltese cross, etc.. can mean overbores, bearing size changes, etc....

What's the block casting number (on the manifold side of the block)?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Dan, the numbers on the manifold side of the block are below.

Uppermost > 08305:
Main numbers? > 2483430-12
Upside down near the starter > 2140

The paint on the main numbers is a bit heavy, the third-digit could be a 6, which would make this a '66 block (I think). I'll give it a better look and get back to you all.

Thanks to all who have responded!

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'68 Barracuda - taking advice on increasing street torque, power, & road handling. Click To See It

Yup, 2463430 is a '63-'67 RG block with three freeze plugs. That's a little interesting: given the engine build date code DusterIdiot correctly decoded (2243 = 18 September 1967), and the engine's presence (originally?) in a '68 model, it theoretically should've had the '68-'76 2806830 RG block with five freeze plugs. Nevertheless, there's no reason why the earlier block would be incompatible with any aspect of a '68 engine or vehicle. The '68-up large-counterbore crankshaft is fully compatible with the '67-down block and vice versa. The "2140" cast number you found (7 June 1967) makes me think what we're seeing here is a '68-model engine build up with a '67 block. Block cast in June, engine assembled in September to go into a '68 car, that adds up.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks to all - this is an invaluable resource as a slant-6 owner. The collective knowledge and willingness to share your information is incredible. Best, -Chris

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'68 Barracuda - taking advice on increasing street torque, power, & road handling. Click To See It

For what it is worth, I once bought a 225 that had been removed from a 68 Dart (original motor to car). It was a three freeze plug block but the engi e ID number on the pad had been stamped over and a maltese cross added to the end (I believe that means .010 undersize bearing from the factory). I think it was a 67 engine that was remachined by the factory and installed in a 68 Dart. I used several post-68 904 transmissions with that engine and had no problems.