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BOP 455....

Discussion in 'The Garage' started by RustBuket, Jan 25, 2004.

  1. RustBuket

    RustBuket 1/2 ton status

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    There is a local guy with a buick 455 and he says it'll bolt up to any chevy tranny. What other kind of modifications would my '81 Blazer require to shove a big block in it? Its fairly cheap but needs rebuilding. Anyone got experience with this swap?
     
  2. mountainexplorer

    mountainexplorer 1/2 ton status

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    BOP motors are just that... Buick, Olds and Pontiac. The tranny bolt pattern is specific to those three only. Chevy tranny's won't bolt up as far as I know. I have a Buick 455 I want to put in a 4x4, and I'm going to have to use the Buick TH400 tranny and a divorced T-case. I suppose there are other ways you could make that motor work in a 4x4.
     
  3. RustBuket

    RustBuket 1/2 ton status

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    So basically it would be a completele redesign of the drive line... Well that sucks because I was hoping it'd be easier than that... O well I'll keep my eyes peeled for a nice 454 or something. Or maybe I should just stick with the freshly rebuilt 305 that has a few hundred thousand more miles to live yet.... /forums/images/graemlins/rotfl.gif
     
  4. mountainexplorer

    mountainexplorer 1/2 ton status

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    Well, a 454 would probably be better and easier.

    I've heard that the Buick 455's are a little different than the Olds and Pontiac motors. The Buick motors have the distributor in the front which mounts through the water pump, and I've heard this is a worse setup than other Olds/Pontiac 455's. But I'm no expert on these motors.

    What tranny and T-case are you running now and what do you want to run?
     
  5. ben427

    ben427 1/2 ton status

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    Well no, you can buy an adapter for like 80 bucks from summit or jegs.
     
  6. RustBuket

    RustBuket 1/2 ton status

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    Alright guys thanks alot. I think I'll stick to chevy being as this motor had a knock when it was removed and two rods need replacing (who replaces two rods?) and the crank needs regrinding. etc! But a 454 would be very very very sweet!
     
  7. SUBFAN

    SUBFAN 1/2 ton status

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    An adapter for mating a BOP motor to a Chevy tranny can be used. They can be found for less than 80, not that difficult to find.

    It depends on how much of a challenge you like. BOP swaps aren't that difficult, but can be time consuming....
     
  8. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    It will bolt up to a Chevy tranny, only the th350c and 2004r with dual bellhousing patterns. Mostly found in gm g-body cars. So just get a 350 chevy, almost everyone has one in their backyard somewhere. /forums/images/graemlins/thumb.gif
     
  9. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    You might want to ask 84K5BD. He's a cool guy and has a sweet K5 with a 455 under the hood.
     
  10. OrangeCrushK10

    OrangeCrushK10 1/2 ton status

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    WAIT! There IS a way to bolt a Buick 455 up to a sm465 tranny!!!

    There are two ways to do this:

    Pre 1981 chevy-gmc diesels. They used the Olds 5.7l diesel bolted to a sm465. Supposedly these will work. However these trucks are very rare. 've never seen one and only heard of them a few times.

    The second, and easiest way, would be to go over to a Jeep bellhousing maker. Jeep guys love using Buick V6's and sm465's. Bellhousing bolt patterns on Buick V6's and Big Block Buicks are exactly the same. The bellhousings run around $300 new.

    As for Olds and Pontiac 455's I can't help ya as they use different bolt patterns. But I hope this helped out some for the Buick!
     
  11. SUBFAN

    SUBFAN 1/2 ton status

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    It is called BOP (c) for a reason, all the same tranny bolt pattern. Oddly enough, Chevy was the odd man out, and look who won in the end, because of favoritism /forums/images/graemlins/eek.gif
     

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