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Jberg6
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Joined: 04 Jan 2013
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 Posted: Fri Jan 04, 2013 2:18 pm Post subject: GBD block swap |
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I was wondering if any of you diesel junkies could help me with an issue I am having. I have a 55 GBD with a tired engine. I would like to swap engine blocks with a gas 504 that I have.(cast #1010248) Is this possible? Will they bolt up directly? Please help.Thanks
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mmdiesel
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Joined: 11 Dec 2012
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| Posted: Fri Jan 04, 2013 3:45 pm Post subject: Re: GBD block swap |
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The gas jugs will slide right on the crankcase. The problem is that the diesel jugs have extra studs to hold the heads on. I would suggest boring the jugs. Pistons should be available in either .030 or .060 over.
Michael Moeller
mmdieselpuller@yahoo.com
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mightymolinekid
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| Posted: Fri Jan 04, 2013 3:58 pm Post subject: Re: GBD block swap |
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Michael's 100% right. Bore the diesel jugs, the gas ones are not a direct swap on.
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MM g1000
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Joined: 18 Nov 2012
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| Posted: Fri Jan 04, 2013 5:56 pm Post subject: Re: GBD block swap |
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The part # you gave is a 504 336 diesel jug and it will bolt right in place of a 425 jug.
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Jberg6
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| Posted: Sat Jan 05, 2013 5:29 pm Post subject: Re: GBD block swap |
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I was wrong on that casting # the blocks We have are #10A149A
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Shawn W
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Joined: 30 Aug 2004
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| Posted: Sun Jan 06, 2013 6:11 am Post subject: Re: GBD block swap |
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Bore the blocks out. Get 900 diesel pistons. I think you can get them in. O40 over and that will make right at 466 cubes. I did that to one i used to work on and it made a very good running engine with the extra compression. Give Wendell a call and he can set you up.
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