HP blocks

[63SplitWindow]

What years were the HP 440 blocks cast? I thought they were pretty limited in production.

 

[Wietse]

HP block has no difference with a standard block, they were designated as HP during assembly.

 

[63SplitWindow]

Understood......but what years were they stamped HP?

 

[Wietse]

Not sure but I think this was from '65 till '70.
Guess it stopped as the emission era kicked in.

 

[69 Sleeper Bee]

I think 1972 but have heard as late as 74 but can't prove it

 

[Wietse]

I think 1972 but have heard as late as 74 but can't prove it

You think these post '70's were build as HP? I am thinking they were old stock that was used after being modified to follow the emission regulations.

 

[RemCharger]

67-74.

 

[dvw]

The only thing that made a RB a HP was the cam and compression. All else is the same. The block is no different.
Doug

 

[Curiousyellow71]

We have a 73 440 stamped hp and a 79 360hp
In the 70s many engines stamped 440hp were in police cars.
Like said...its just a stamp. No difference other then internals on a 440. The 360hp there was differences. But that wasn't the question.

 

[4speed68rt]

I've got a '72 HP 440 "H". It has 6 pack rods and cast crank. I think it came out of a 'Cuda.

 

[440 PHIXX]

If you want an “HP block”... you can get the stamps for under $30. There. You have an “HP block”

 

[440 PHIXX]

I've got a '72 HP 440 "H". It has 6 pack rods and cast crank. I think it came out of a 'Cuda.

A cast crank wouldn’t have been factory. They didn’t show up until middle of 1973.

 

[4speed68rt]

A cast crank wouldn’t have been factory. They didn’t show up until middle of 1973.

I think it was a replacement crank, it could have been the "cheaper" way to go at the time for the previous owner. It was 35 years ago when I got it. Its still the same. The block is "HP" for sure. and the rods look super strong, it just has to be externally balanced. ( I would sell this complete motor)

 

[RemCharger]

I've got a '72 HP 440 "H". It has 6 pack rods and cast crank. I think it came out of a 'Cuda.

A 72 cuda with a big block is a new one on me

 

[4speed68rt]

A 72 cuda with a big block is a new one on me

I am unsure what it came out of. It was cast on 6/5/71. What kind of car could have it came out of? What cars came with HP 440 in "72? Thanks

 

[RemCharger]

I am unsure what it came out of. It was cast on 6/5/71. What kind of car could have it came out of? What cars came with HP 440 in "72? Thanks

Charger and GTX. Cop cars.

 

[4speed68rt]

Charger and GTX. Cop cars.

Cool, I will keep that in mind. Thanks. I wonder what the OP was wanting to know about HP blocks for. Probably not for that split window!!

 

[RemCharger]

Would be a good way to make the split window really move though.

 

[69Coronetrt]

I am unsure what it came out of. It was cast on 6/5/71. What kind of car could have it came out of? What cars came with HP 440 in "72? Thanks

What the VIN? If we know what plant the car came from, that narrows what it could have come out of.

 

[Dave6T4]

Were the 1966 365 hp. 440 dual exhaust motors in "C" bodies stamped HP? As opposed to 350 hp. single exhaust. I know these engines still had the smaller port/exhaust valve heads. HP engines also had windage trays from factory.