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Old 10-13-2002, 07:05 PM
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Post Block question?

Hey Bowtie Guys.
I know the 350 blocks changed in 86, but other than the crank needing a 1 or 2 piece rear main seal, is the durability of both early and late model 4 bolt cranks the same?
If I build a blown 350 would it matter which year block I used as long as it was a 4 bolt?
Oh yea, does any oil pan fit or can you use an older style? Thanks, HG

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Old 10-13-2002, 07:21 PM
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The oil pans do not interchange.

I do not know if a 86 up block is as strong or not. I prefer a 1 piece seal block for a hot (non supercharged) street engine. They do not leak. The rear seal is vastly better than the 2 piece and they have a 1 piece oil pan gasket that is great.

Some of the later 1 piece rear seal blocks use a O ring type seal for the timing chain cover. I like those better too.

NO LEAKS.......
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Old 10-13-2002, 07:32 PM
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As for the oil pan, the 86 block with the 1 piece rear seal has the dipstick on the passenger side. Most earlier small blocks have the dipstick on the driver side. You will have to have a oil pan that is for 86 or newer small blocks. I got a brand new chrome oil pan off of ebay for about $40 including the shipping. Hope this helps you some.
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Old 10-13-2002, 07:40 PM
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I seen those oil pans your talking about, sweet! But what about strength? Im looking at a 500+ blown sbc and want to make sure it will work. HG
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Old 10-13-2002, 07:48 PM
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The new oblock should be fine. gmpp is putting 430hp and 36000 mi guarante
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