Correct 66-67 427 BB fan shroud bolt question - NCRS Discussion Boards

Correct 66-67 427 BB fan shroud bolt question

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  • Bill C.
    Very Frequent User
    • May 31, 1989
    • 424

    Correct 66-67 427 BB fan shroud bolt question

    Hi all,
    Trying to determine the correct bolt used to mount the fan shroud to the radiator support on 1966-1967 427 cars ( I am assuming that the same bolt was used on sb cars, I know the original j-nuts were) . Hopefully someone can describe it or even better post a pic on the board. I do not trust to be accurate what is supplied by any of the vendors.

    I think the correct originals were a tapered point with a captive washer, black phospated. Similar to a seat mount or small lower spash shield or hood latch reciever on firewall bolt. I am also concerned with is it the same bolt used on an air conditioned car? Is it the same bolt used to retain the A/C fan shroud extension ? Current repo bolts I see are the "WB" style silver finish bolts with a separate flat waser, like whats found on a top alternator adjusting bolt.

    I do not trust the Assembly manual either, what was planned to use and what was actually used, especially in an area such as this do not always match. So I hope I can get some ID help from known "unrestored" cars.

    Thanks in advance!
  • Jack C.
    Extremely Frequent Poster
    • September 30, 1992
    • 1090

    #2
    Re: Correct 66-67 427 BB fan shroud bolt question

    My early 68 427 has an Allen head with a flat washer and a 5/16 nut. Can be a possible carryover from 67.
    Last edited by Jack C.; December 30, 2008, 04:27 PM.
    Jack Corso
    1972 Elkhart Green LT-1 Coupe 43,200 miles
    Top Flight 1994, 2018 & 2021

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    • Wayne W.
      Extremely Frequent Poster
      • April 30, 1982
      • 3605

      #3
      Re: Correct 66-67 427 BB fan shroud bolt question

      This is the type bolt for the shoud attachment. This particular one is SB.



      This is the type bolt used on shroud extensions. This also is a SB.

      Last edited by Wayne W.; December 31, 2008, 02:16 AM.

      Comment

      • Bill C.
        Very Frequent User
        • May 31, 1989
        • 424

        #4
        Re: Correct 66-67 427 BB fan shroud bolt question

        Wayne'
        Thanks for making that effort. I really appreciate it. Are the 4 bolts holding the shroud to the support the same as the one you show on the upper bracket? The ones you show on the extension are the ones I see supplied by the vendors for use on the 4 side locations also, I did not think that was correct and felt those were as you show on the upper bracket in your pic.
        Bill

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        • Wayne W.
          Extremely Frequent Poster
          • April 30, 1982
          • 3605

          #5
          Re: Correct 66-67 427 BB fan shroud bolt question

          Originally posted by Bill Caldwell (15218)
          Wayne'
          Thanks for making that effort. I really appreciate it. Are the 4 bolts holding the shroud to the support the same as the one you show on the upper bracket? The ones you show on the extension are the ones I see supplied by the vendors for use on the 4 side locations also, I did not think that was correct and felt those were as you show on the upper bracket in your pic.
          Bill
          Yes, the same type. The head markings may be variable.

          Another shroud extension example.

          Comment

          • Fred Y.
            Very Frequent User
            • April 30, 2000
            • 319

            #6
            Re: Correct 66-67 427 BB fan shroud bolt question

            Bill,I can have a look @ my roadster when I get home t/night & give you a call if you like.Happy New Year.
            Fred

            Comment

            • Bill C.
              Very Frequent User
              • May 31, 1989
              • 424

              #7
              Re: Correct 66-67 427 BB fan shroud bolt question



              Fred,
              Go for it, if you can find 'em! What do your shroud attaching bolts and extension mount bolts look like on the coupe? How is your lh horn mounted and where. Pics would be great. How is the Conv coming? Got pics? Long winter so far, not seeing anyone!
              Hope all is well, Happy New Year,
              Bill

              Comment

              • Rich P.
                Expired
                • January 12, 2009
                • 1361

                #8
                Re: Correct 66-67 427 BB fan shroud bolt question

                Sorry to dig up old posts but i am having fun!!!

                Here is a picture of 2 RSC radiator saddle/fan shroud bracket to radiator support bolts along with 1 WB Fan Shroud to radiator support bolt. This style bolt (1/2 hex grade 2 7/8" or 3/4" long) is what was used 90% of the time. Other headmarkings for this application were SBC, WB1C and L (there were others but I can't think of any right now)

                Rich
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