Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Like Tree3Likes
  • 3 Post By rspears

Thread: 1969 chevy small block water pump hub bolt pattern

Reply To Thread
Results 1 to 2 of 2
  1. #1
    jrz28cam355 is offline CHR Junior sMember Visit my Photo Gallery
    Join Date
    Aug 2020

    1969 chevy small block water pump hub bolt pattern


    I purchased a new water pump,long style but when I went to mount the pulley,the bolt holes did not line up, they are about a half a hole off. The water pump hub is half a hole smaller than the pulley. This pulley came off a 1978 camaro with a 350. Are there different water pump hub bolt paterns or do I need to get a different pulley?

  2. #2
    rspears's Avatar
    rspears is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Sep 2007
    Gardner, KS
    Car Year, Make, Model: '33 HiBoy Coupe

    Some SBC pumps came drilled & tapped for two different 4 bolt patterns. This picture was highlighting shim sets sold by Mr Gasket, but clearly shows the difference in spacing. I'd say you'll either need to get a different pump or a different pulley to fit the new pump you have.
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink