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426 HEMI BLOCK CODES #1518027 10/15/13 06:07 PM 10/15/13 06:07 PM
Joined: Oct 2013 Posts: 2 DETROIT MICHIGAN D DETROITTIGER OP member
DETROITTIGER OP member D Joined: Oct 2013 Posts: 2 DETROIT MICHIGAN	I HAVE A NEW OLD STOCK 426 HEMI BLOCK WITH A CASTING NUMBER OF 2468330-M. MOST HAVE A -1 WHAT DOES THE -M STAND FOR? ALSO THE MACHINED PAD UP FRONT HAS MG144 668X STAMPED ON IT. I'VE SEARCHED THE INTERNET AND LOOKED THROUGH A FEW BOOKS AND CANT FIND ANY THING THAT EVEN COMES CLOSE TO MATCHING UP. CAN ANY ONE HELP ME FIGURE THIS OUT. ANY INFO WOULD BE GREATLY APPRECIATED THANKS

Re: 426 HEMI BLOCK CODES [Re: DETROITTIGER] #1518028 10/15/13 06:23 PM 10/15/13 06:23 PM
Joined: Jan 2003 Posts: 32,928 Grand Prairie,Texas stumpy I Win
stumpy I Win Joined: Jan 2003 Posts: 32,928 Grand Prairie,Texas	Welcome to Moparts but just a hint please turn off the caps. On this site it's considered yelling and impolite. Thanks.

Re: 426 HEMI BLOCK CODES [Re: stumpy] #1518029 10/15/13 06:47 PM 10/15/13 06:47 PM
Joined: Jan 2003 Posts: 6,391 Abilene, Texas F fastmark master
fastmark master F Joined: Jan 2003 Posts: 6,391 Abilene, Texas	I'm sure someone knows for sure but I think the M after the part no means it is one of the new motors cast a few years ago and not a 64 to 74 oem cast. What is the date cast into the block?

Re: 426 HEMI BLOCK CODES [Re: fastmark] #1518030 10/15/13 08:42 PM 10/15/13 08:42 PM
Joined: Oct 2013 Posts: 2 DETROIT MICHIGAN D DETROITTIGER OP member
DETROITTIGER OP member D Joined: Oct 2013 Posts: 2 DETROIT MICHIGAN	J 30 2 is cast near the casting number on the side of the block

Re: 426 HEMI BLOCK CODES [Re: DETROITTIGER] #1518031 10/15/13 10:47 PM 10/15/13 10:47 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	The M signifies a Mopar Performance block cast in 90's or so. Sheldon

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