Is my P-code a big block?

1971 - 1974 Mopars

  1. dillon14

    dillon14 Member

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    I have a 1973 Road Runner P-code 400ci 4bbl carb with automatic. I called it a 400 big block and a person got all over me. He said other than the 440ci, 1972 1/2 was the last year for big blocks. He said my 1973 400ci engine was considered a small block. Is he right?
    Al in Maine

    IMG_2167.JPG IMG_2168.JPG IMG_2169.JPG
     
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    • SaskRunner

      SaskRunner Well-Known Member

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      He is definitely not right.

      A 400 is a big block
       
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      • dillon14

        dillon14 Member

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        Saskrunner,
        Is there any link I can send him that explains/confirms that?
        Thanks
        Al
         
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        • cryplydog

          cryplydog FBBO Gold Member FBBO Gold Member

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          your friend must be a nancy boy. 361,383,400 are -B- engines, low deck height. 413,426,440 are RB engines, high deck. Both are big blocks. Get your self a factory service manual to hit nancy boys in the lips. Nice car Al. good luck.
           
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          • polywideblock

            polywideblock FBBO Gold Member FBBO Gold Member

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          • WP29440SE

            WP29440SE Well-Known Member

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            Man you need to quit hanging out with idiots
             
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            • mmissile

              mmissile Well-Known Member

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              This person you speak of, is a moron.
               
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              • gtx1of1

                gtx1of1 Well-Known Member

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                tell him to stick to chebys
                 
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                • 69L48Z27

                  69L48Z27 Well-Known Member

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                  Just tell the guy isn't a Mopar and not a Chevy. Bowtie 400" motors were small blocks.
                   
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                  • Beekeeper

                    Beekeeper FBBO Gold Member FBBO Gold Member

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                    Yea this clown has got to be a chevy guy. Raise the hood and let him look at the back
                    of the intake and ask him if he sees a distributor right as you slam the hood on his head.
                     
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                    • 71gtx

                      71gtx Well-Known Member

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                      The first 383 was introduced in 1959, but as the raised block. The dimensions on this engine were a bore of 4.030 and a stroke of 3.750 inches The 350 cubic inch engine was introduced in 1958,
                       
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                      • chargervert

                        chargervert FBBO Gold Member FBBO Gold Member

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                        I have a 73 P code Charger,and it has 400 cubic inch low deck big block engine.
                         
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                        • YY1

                          YY1 Well-Known Member

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                          Chevy guys don't understand things like that.

                          ...or that a Coronet 500 can have a 383 and a Coronet 440 can have a 318.

                          I doubt they even know a buick/olds/pontiac 350 is a big block
                           
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                          • khryslerkid

                            khryslerkid FBBO Gold Member FBBO Gold Member

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                            :rofl:
                             
                          • monaco66coupe

                            monaco66coupe Well-Known Member

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                            I would tell him it is a bigger block because it is bigger than a littler block.(Chevy guys understand baby talk).HAHA
                             
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                            • Nacho-RT74

                              Nacho-RT74 FBBO Gold Member FBBO Gold Member

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                              • tommyg29

                                tommyg29 Well-Known Member

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                                IIRC its the biggest block Ma Mopar ever made!
                                At least the bore size is anyway. Thats what makes them favorites of the stroker crowd.
                                 
                              • Bruzilla

                                Bruzilla Well-Known Member

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                                You're dealing with a Chevy guy. Chevy 400s are small blocks. Mopar 400s are big blocks.
                                 
                              • Cranky

                                Cranky Banned Staff Member FBBO Gold Member

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                                Chrysler big blocks were produced up to and including 1978 and even some early 1979 model cars and trucks showed up with them from the factory. Even though the 'performance' car died years earlier doesn't mean that the big engines were discontinued at that time but the 440 was a pretty rare sight towards the end.....
                                 
                              • tommyg29

                                tommyg29 Well-Known Member

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                                I also remember a lot of RV's were equipped with 440s all through the 70s
                                 
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