Has anyone used the Gen7 block from Dart to build a forged 496HO or 540HO?
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Has anyone used the Gen7 block from Dart to build a forged 496HO or 540HO?

  1. #1
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    Default Has anyone used the Gen7 block from Dart to build a forged 496HO or 540HO?

    In an effort to turn up the juice on my 496HO, I was thinking of the following.

    Phase I: Dana exhaust
    Phase II: Raylar 525 kit
    Phase III: Slide a forged dart shortblock (540+ cuins) under the Raylar heads.

    I could see Phase III requiring some ECU work and/or some injectors

    Spread the cost over 3-4 years. Hopefully have some reliable motivation between phases.

    I have heard nothing about the Dart block (or rumored shortblock) being used.

    The information on Dart's site Gen 7 Chevy Big Block
    doesn't really indicate max bore size, so I'm not sure this is a real option or just a stock replacement block for industrial engine builders. It would be interesting to know if that block would take a 4.5 or 4.6 bore or not. A 540-565 forged shortblock with a Raylar top end Might make for a well mannered combination.

    Options and prices seem to be undercover for 496 owners. I'm surprised there isn't more love for this overgrown LS motor. I've been watching for Gen7 builds but haven't seen much.

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  3. #2
    Some guy obnoxious001's Avatar
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    Default

    Easy enough to give Dart a call and find out maximum bore size. Note that it takes metric head bolts.

  4. #3
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    I have hit Dart up. I haven't gotten an answer on that yet. Course I'm waiting for the Raylar price list as well.

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