72 400?

[pullrock]

Hello Charger fans,

Have a question about an engine that recently purchased.  it's a 400 engine that was pulled from a 1972 Plymouth Satellite Police car (that is what I was told).  Here is the question.  On the side of the block it has 36986930-400-5.  What does the 5 stand for   I have found reference to -2, -4 and -6 but not sure what the 5 means?  Is this anything special?  What will I found when I pull this a part?  I want to use the block to build a Stroker for the street.

Thanks,

Eric
68 Charger R/T

[AKcharger]

Not sure but There are a bunch of rumors out there bout which blocks are best (some say '71 blocks are thicker) after talk to a BUCH of people I think their all about the same...some better than others but not based on a specific "year" of manufacture

Have fun

AK

''72 rallye 400/470

[RD]

"-5",  if i am not mistaken, is the 5th mold used by the foundry.

the molds become brittle after so many castings so they have to switch them with new ones.  I believe the 5 stands for 5th mold they used to cast the engine blocks.

[John_Kunkel]

The dash number is called the Core Casting Index Number, it is the number of core plugs that were changed in the casting core.

It's thought that a higher number has a higher chance of having core shift but it's never been proven.

[pullrock]

Thanks for all the good info...  It sounds like I just have a regular 400.