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Big Block Suggestions Needed

Old 01-02-2005, 11:37 AM
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Default Re: Big Block Suggestions Needed

Felpro makes gaskets to bolt mark4 heads on a gen5 block. I think 17046 is the number maybe 17048 too BBB
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Old 01-02-2005, 11:41 AM
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Default Re: Big Block Suggestions Needed

Also these motors are mentioned as two bolt blocks, gen5 and newer only come in 4 bolt . They have to be mark4. Use felpro 17040 head gaskets. Am I post hoggin' ?
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Old 01-02-2005, 05:14 PM
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Re: Big Block Suggestions Needed

Yeah bbb,quit hoggin the board!!! get over to the brezze your buddy tripps
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Old 01-02-2005, 11:37 PM
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Default Re: Big Block Suggestions Needed

Big Block Billy,

Thanks for the info. I dont think your hoggin, I really need the help...

So everyone agrees that the Vortec heads will work on the older block with the special Fel-Pro gasket?
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Old 01-03-2005, 08:36 AM
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Default Re: Big Block Suggestions Needed

The Merlin heads will also work on MKIV and GENV engines.
The FelPro 17048 head gasket is for a bore size of 4.500, I believe the 17040 is for a bore of up top 4.350, 4.310 for sure.
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Old 01-03-2005, 11:45 AM
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Default Re: Big Block Suggestions Needed

Originally Posted by Prater
Big Block Billy,

Thanks for the info. I dont think your hoggin, I really need the help...

So everyone agrees that the Vortec heads will work on the older block with the special Fel-Pro gasket?
Check into this carefully. I was told that my GM Mark 4 heads would not work properly on a Gen 5 or 6 block no matter what gasket. Im not sure about the other way around. Aftermarket heads on the other hand will fit any of them. I think.
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Old 01-06-2005, 05:51 PM
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Default Re: Big Block Suggestions Needed

I picked up a complete 454 today from the salvage. they did not gaurantee the lower end but did gaurantee the heads rebuildable. supposedly had a rod knock. the heads were 049 castings. $100 we just had to dig it out of their motor pile inside an old barn. Just drpped it at the machine shop to be checked out...
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