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Tight clearance on 454??

Discussion in 'The Garage' started by txfireman110, Oct 24, 2005.

  1. txfireman110

    txfireman110 1/2 ton status

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    Dropped a 454 into the mouth of the beast, and the clearance between the oil pan and the crossmember seems AWFUL tight. I used 350 motor mounts (i think) Any one else have this problem? Solutions?

    Thanks
     
  2. Russell

    Russell LB7 Tahoe Status Premium Member GMOTM Winner

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    big block mounts will lift the engine higher than small block mounts :)
     
  3. mechted

    mechted 1 ton status Premium Member

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    or you can insert a spacer so you dont have to buy new mounts
     
  4. jays68yak

    jays68yak 1/2 ton status

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    how close is close?
    custom crossmember, 454 on sb mounts.

    [​IMG]
     
  5. jaysonsk5

    jaysonsk5 1/2 ton status

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    hey i have the same thing with my 454, are we talking motor mounts or motor mount buckets? i used my 305 buckets and 350 mounts, it has had this set up for all 5 small blocks and now a big block. btw how many cubes is a .30 over 454? i hear alot of people saying that they have 468s but i think that a .30 over 454 is more like 461 at .90 over its like 468? any one know for shure? :confused: :confused: :confused: :confused: :confused:
     
  6. BadBob

    BadBob 1/2 ton status

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    .030 over is 460.4, and .060 over is right at 467 and change
     
  7. Shawn

    Shawn 1/2 ton status Premium Member Author

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    Having installed 2 small blocks and 3 big blocks, the engine mounts are pretty much the same you can use SBC mounts for a BBC. The only thing thats different, is where they mount to the frame and the holes. Your mounts might be worn. Replace with new mounts or install Energy poly mounts. I never had a problem with SBC mounts contacting the crossmember even with my 496 doing wheelies in the parking lots! :D
     
  8. thatK30guy

    thatK30guy 1 ton status Premium Member

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    But......almost 99% of rebuilders call their .060 overbored 454 an actual 468. :thinking:
     
  9. jaysonsk5

    jaysonsk5 1/2 ton status

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    hey guys thanks for clearing that .30 over thing up. :bow:
    how far away is your oil pan from the cross-member?
    mine looks like it might be touching :confused:
     
  10. mechted

    mechted 1 ton status Premium Member

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    for my 396 in a 73 K5(stock x-member) its about 1/4" or so...
    its one of those things i keep meaning to address...
     

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