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Old 10-01-2003, 11:58 AM
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older block to newer roller

OK Guys i have heard a lot of storys, now give it to me straight, what has to be done to an older chevy 350 cid block to except an aftermarket roller cam? Thanks in advance,,and be kind

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Old 10-01-2003, 12:29 PM
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Nothing, but you need to use a lifter that uses a bridge to keep them from turning sideways in bore.

Newer blocks have tapped holes to mount the factory tin "spider" to keep lifters from turning then you would be able to use the stock hyraulic lifters too.
Cost is less with OEM hardware thats why everybody recommends finding a newer one piece rear seal block. Not all one piece seal blocks have the tapped holes though.
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Old 10-01-2003, 12:35 PM
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Thanks Greg for the fast reply,,, no machining of the block at all,,sounds like a winner to me. Not even where the lifter bar hits the block? seams like a tight fit to me. Thanks again,, Al
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Old 10-01-2003, 12:42 PM
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No machining but you do need a way to limit the forward motion of the camshaft. Later blocks had a retainer plate. For your application a good cam button is required.
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Old 10-01-2003, 08:15 PM
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Thanks guys,i knew i would get the info i needed here.
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Old 10-01-2003, 11:35 PM
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Don't forget different length pushrods and roller valvesprings. And make sure you have the right distributor gear.
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