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Hot Rods chrysler hemi guys, i need a measurement

Discussion in 'The Hokey Ass Message Board' started by silent rick, Jul 24, 2017.

  1. silent rick
    Joined: Nov 7, 2002
    Posts: 3,910

    silent rick

    just need the exact distance on centers of the top two water pump mounting holes.

  2. George
    Joined: Jan 1, 2005
    Posts: 7,082


    What engine, year, & W/P?
  3. Yes which one?
  4. tubman
    Joined: May 16, 2007
    Posts: 4,459


    I have a ' 56 331 truck engine under the stairs that I can measure easily, but the other guys are right : which specific engine?
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  5. 1957 392----- 8.5" between the top 2 bolts in the timing cover which I think is what you asking.
  6. rooman
    Joined: Sep 20, 2006
    Posts: 3,764


    Top water pump holes are 8.375 apart on my 392--measured between spotting transfer punch tips and also outside of bolt head to outside of bolt head, minus one bolt head width as a back up. The timing cover top bolts are actually on 2.75" (or thereabouts) apart.

  7. silent rick
    Joined: Nov 7, 2002
    Posts: 3,910

    silent rick

    i have a 241 dodge hemi. i want to shit can the oem water pump housing and adapt a chevy water pump.

    hot heads sells adapters to use a sbc pump on dodge hemis.
    they also sell adapters to use a bbc pump on chrysler hemis.

    I prefer the bbc pump for the mount they have off to the side. makes for a clean alternator mount. I've seen bbc pumps on 241's. jack(phat rat) here on the hamb is running one.

    now there is about a 1 1/4 inch difference in width between sbc and bbc water pumps. I'm so confused. if phat rat is running a bbc pump on his 241 with adapters, how would it be possible to run a sbc pump on one. wouldn't the sbc pump be too narrow?
  8. Frankie47 likes this.

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