HP and HP2 what is the difference

[moparnorth]

HP and HP2 what is the difference stamping on top engine.

 

[BDF6]

"2" ?

 

[1 Wild R/T]

HP and HP2 what is the difference stamping on top engine.

HP is built during the 8-4 shift.... HP2 is built during the 4-midnight shift.... The 2nd Shift....

 

[moparnorth]

thanks

 

[BDF6]

Sorry, couldn't resist...
https://www.440source.com/blockinfo.htm

 

[Lefty71]

Day shift, and afternoon shift. Thats the only difference I've ever heard. But I've seen quite a few folks searching for an elusive HP2 block because the HP block just won't do, lol.

 

[Darter6]

Learn somethin' new every day..

 

[Lefty71]

Sorry, couldn't resist...
https://www.440source.com/blockinfo.htm

Can you imagine the uproar you could create if you could locate an HP3 block??

 

[66Satellite47]

I've had many 440 blocks, many different years. IMHO no difference between HP & non HP blocks other than the stamping. Also I agree with Source, I never saw any cylinder wall thickness difference between any year of block, only the difference from one block to another due to core shift or other casting differences. The ones I weighed also were nearly the same early or later.

 

[moparnorth]

thanks for the info

 

[Ceedawg]

A friend turned down a $100 non hp 69 bare block, some dude was selling. I said why? He said it was a low performance block??? I just shook my head and walked away

 

[moparnorth]

are police 440 blocks any different

 

[fratzog lover]

No.

 

[rev.ronnie]

Night and day difference, literally.

 

[moparnorth]

Night and day difference, literally.

what the deference

 

[1 Wild R/T]

what the deference

Whether the engine was build at night or during the day.....

 

[YY1]

none built on third shift is kinda odd.

didn't I see "HP2" emblems?

 

[1 Wild R/T]

none built on third shift is kinda odd.

didn't I see "HP2" emblems?

probably didn't run a third shift in engine assembly....
Yes there were HP2 emblems they were used on the early 66 Hemi Belvederes... They were replaced with 426 Hemi emblems mid year... But that has nothing to do with the HP2 stamps on engine data pads...

 

[Cranky]

none built on third shift is kinda odd.

didn't I see "HP2" emblems?

From what I understand from people who worked there back in the day, a 3rd wasn't all that common for ChryCo.

 

[HEMI-ITIS]

In 62 Hoover sourced the industrial blocks for their high nickel content. I'm not sure if at some point all blocks were.