RE: Help in decoding block numbers
2536430 Chrysler - Dodge - Plymouth RB 66-72 440is the first engine
the second i could not find a casting number for that
4006630 Chrysler - Dodge - Plymouth RB 78 440is the closest i found this is probably because they stopped production of the 440
864006630440 CID
1978Body = RB
the engine casting seems to denote that after the first set of numbers the - it says 440 than its a 440 not a 383
now heres the issue you stated its physically larger and heavier. now if this is perhaps a later model motor for industrial use it could have forged internals which could slightly make it heavier. but not noticably. hemi heads on there for some weird reason? take pictures id like to see this block i searched the intire internet and could not find info on this block with the casting number. do u have head casting numbers?
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2005 dodge sxt stock mods comin soon
1972 dodge d-100 mild build 360 and 727
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