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Old 08-25-2019, 08:50 PM   #1
Vet65te
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Default 400 SBC Oil Pan Recommendations

Finally got my 400 Smallblock assembled but have discovered the new Dorman Pan, #264-104, while providing more than adequate clearance from the face of the oil pan sump to the rear of the steering linkage, the pan itself doesn't have enough clearance to the rear crank throw. I've looked through the archived threads and no definitive suggestions. Check out the pics.
I'd guess there's enough stroker motors out there, including the new GM 383 which has the 3.800 stroke crank that there has to be an aftermarket oil pan that will work.
Thanks, Mike T - Prescott AZ
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Old 08-25-2019, 09:06 PM   #2
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Rock Auto has one here:https://www.rockauto.com/en/catalog/...e,oil+pan,5562

Saw this note: Late Design; Requires Thicker Oil Pan Gasket;

Just thinking out loud here Mike....Maybe a thicker gasket would be the answer to your problem?
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Old 08-25-2019, 09:20 PM   #3
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I have a stock Milidon oil pan on my 55 chevy with my 406 engine, which is a bored 400 cid engine
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Old 08-25-2019, 09:24 PM   #4
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Pops - I'm thinking I'd have to 'stack load' about a half dozen of the gaskets in order to distance the pan from the crank counterweight.

Top Dog - Happen to have a part number for that Milodon and also curious as to how much clearance you have from the sump face to the rear of the steering linkage?

Mike T - Prescott AZ
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Old 08-26-2019, 05:09 AM   #5
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I also used a Milodon pan on my 400 but can not find the part #. I think it was listed for a Chevelle but not sure.
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Old 08-26-2019, 08:00 AM   #6
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Default Milodon oil pan

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Old 08-26-2019, 11:24 AM   #7
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That Milidon Pan, 30700 looks like it should work. I can see the 'dimple' they added on the drivers side rear to accommodate the larger crankshaft.
Can anyone tell me if this pan will still work with PS and the 3/4" forward motor mounts from Williams?

Also, the Summit listing mentions the larger front seal, curious if the new Fel Pro one piece pan gasket can be used with this Milodon Pan.
Thanks,
Mike T - Prescott AZ

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Old 08-26-2019, 11:25 AM   #8
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Slot the bolt hole(s), a solid hit with a BFH on the inside of the pan rail should spread the pan a bit. Use Allen head bolts.
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Old 08-26-2019, 11:48 AM   #9
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ChurchKey - Funny you should mention that, I just got off the phone with the local machine shop guy who did the work on my 400 and that's what he suggested too. Actually he said 'get a large ballpeen hammer' so I did and while the pan isn't completely bolted down, there are '4' screws holding it in place and no 'sounds' while rotating the crank in there so I may be good to go.
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