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GBD block swap


 
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Jberg6
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Joined: 04 Jan 2013
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PostPosted: Fri Jan 04, 2013 2:18 pm    Post subject: GBD block swap Reply to specific post Reply with quote

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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PostPosted: Fri Jan 04, 2013 3:45 pm    Post subject: Re: GBD block swap Reply to specific post Reply with quote

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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PostPosted: Fri Jan 04, 2013 3:58 pm    Post subject: Re: GBD block swap Reply to specific post Reply with quote

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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PostPosted: Fri Jan 04, 2013 5:56 pm    Post subject: Re: GBD block swap Reply to specific post Reply with quote

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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PostPosted: Sat Jan 05, 2013 5:29 pm    Post subject: Re: GBD block swap Reply to specific post Reply with quote

I was wrong on that casting # the blocks We have are #10A149A
 
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Shawn W
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PostPosted: Sun Jan 06, 2013 6:11 am    Post subject: Re: GBD block swap Reply to specific post Reply with quote

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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