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Old 10-20-2007, 10:04 PM
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Difference between pre '86 and post '86 350?

In searching for parts for my '87 350 I am finding things like Edelbrock manifolds up to 1986 and other parts that say "up to 1986 SBC"... Whats the diff between a chevy 350 up to '86 and after '86? Will I not be able to steal parts off a pre '87 350 to use in my '87 350?

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Old 10-20-2007, 10:14 PM
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The later engine has a one piece rear main seal. Also, it takes a different cam that uses a proper retainer. This was always one of the main shortcomings of the earlier SBCs. Also many later SBCs utilize a roller cam, the benefits of which go without saying.
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Old 10-20-2007, 11:21 PM
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The center 2 intake bolts have a different angle on the 87 up engine and the 86 back engine uses the standard 55 to 86 pattern.
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Old 10-20-2007, 11:27 PM
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Difference between pre '86 and post '86 350?

Thanks Deuce.... that blows......... so I wont be able to use the Edelbrock Performer intake manifold off my old SBC?
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Old 10-21-2007, 12:43 AM
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Check the center bolt holes on your intake. if they're the same angle as all the rest, you can. If they're an obviously different angle you can't.

The oddly angled center bolts I thought appeared in the 87 TBI trucks only. I think other SBCs like TPI stayed the same.
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Old 10-21-2007, 02:29 AM
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Quote:
Originally Posted by flyinv55
In searching for parts for my '87 350 I am finding things like Edelbrock manifolds up to 1986 and other parts that say "up to 1986 SBC"... Whats the diff between a chevy 350 up to '86 and after '86? Will I not be able to steal parts off a pre '87 350 to use in my '87 350?
You can use most all the parts from the pre 1987 engines on the later 1987 engines . The 1980 and older engines have a different oil pan . Dip stick is on the driver side of the older blocks . Also some 1987 and newer blocks are not drilled for a manual fuel pump rod . If the block has a block of plate then you should be able to run a fuel pump . Also most 1987 and newer engines have roller cams . This means you will need a hardened dist gear . Or if you want you can remove the roller cam and install a flat tappet one . I do not like the 1980 or newer blocks . The 1976 and older block are the best to build . But if you have any SB 350 Cool build it . it will run good !
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Old 10-21-2007, 02:41 AM
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Quote:
Originally Posted by flyinv55
Thanks Deuce.... that blows......... so I wont be able to use the Edelbrock Performer intake manifold off my old SBC?
Good news you can use that intake . You will have to drill the center bolts on a angle . Then use some hardened flat washers . But if that engine has a roller cam make sure to use a hardened dist gear . And you may have to run a electric fuel pump .
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