C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Do 383 conversions need small base cam?

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Old Oct 5, 2007 | 10:15 PM
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Default Do 383 conversions need small base cam?

There are many rotating assemblies available to rebuild my 350 to 383. Some that I've seen advertised, mentioned they require the use of a small base cam to clear the connecting rods. Others don't mention it. I'm wondering if there are some that will clear a standard cam?
Anyone got any experiance with this one?
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Old Oct 5, 2007 | 11:06 PM
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Yes there are many 383 rotating assemblies that can use a standard cam.
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Old Oct 5, 2007 | 11:22 PM
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it can help a lot if the builder has the cam when preparing the engine.
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Old Oct 5, 2007 | 11:26 PM
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I didn't have to use one in my former 383. I used a regular Comp cam 306 aka the best cam for a street 383!
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Old Oct 5, 2007 | 11:43 PM
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Originally Posted by STL94LT1
Yes there are many 383 rotating assemblies that can use a standard cam.
No problems with the Scat H beam rods and .565 lift cam.
(.376 lift at cam)
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Old Oct 6, 2007 | 12:43 AM
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Unless you get a kit that is advertised to clear...the kit may or may not clear. Certainly depends on the cam in question too-lift/duration gets in the way.

I see above-he had no issues, but I possibly have the same rotating assembly (4340 crank and h beam 5.7 rods) with my setup and it hit my GM 847 cam-.595 lift/304 duration.

I blame (?) aftermarket parts...as my 407 SBC with similar parts also had issues and it wasn't a stroker!

But then again, it runs fine (as high as 7400 rpm thus far)!

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