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74 NovaMan's 1979 Chevy Truck - LS Swap - 5/6 Drop

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  • SuperBuickGuy
    replied
    Originally posted by 74NovaMan View Post

    How do you like your rockers? The ones I ordered arrived last night and there is noticeable play perpendicular to the shaft. I'm probably going to return them.
    I haven't spent any time with them, but they seemed to flip fine when I was idly playing with them while 'listening' to my wife....

    Leave a comment:


  • 74NovaMan
    replied
    Originally posted by SuperBuickGuy View Post
    How do you like your rockers? The ones I ordered arrived last night and there is noticeable play perpendicular to the shaft. I'm probably going to return them.

    Leave a comment:


  • 74NovaMan
    replied
    Thanks for the specifics.

    Leave a comment:


  • SuperBuickGuy
    replied
    the lifters $100
    https://www.ebay.com/itm/GM-LS7-LS2-...72.m2749.l2649

    the rockers $190
    https://www.ebay.com/itm/Chevy-GM-LS...72.m2749.l2649

    the buckets $34
    https://www.ebay.com/itm/LS-GM-OEM-L...72.m2749.l2649
    Last edited by SuperBuickGuy; January 9, 2020, 11:28 PM.

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  • 74NovaMan
    replied
    I went with the $200 choice because $85 seems way too cheap and the $200 guy has great feedback rating.

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  • 74NovaMan
    replied
    $199.99 - 1,780 sold

    https://www.ebay.com/itm/New-LS7-LS2...whQJc~ndk#rwid

    $85.00 - no holders but the ad says 136 sold

    https://www.ebay.com/itm/GM-Hydrauli...UAAOSwHnFVtPdL

    Leave a comment:


  • 74NovaMan
    replied
    Originally posted by SuperBuickGuy View Post
    I bought bulk AC delco off ebay.
    Do you recall who you got them from? I'm seeing a wide range of prices.

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  • SuperBuickGuy
    replied
    those work by simply tying the pairs together

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  • 74NovaMan
    replied
    Another choice for rockers (thanks SBG) - $222.75 from a couple of sources

    https://speedmaster79.com/Chevy-LS1-...tQ2EXEfpIwyvFI

    Click image for larger version

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    These don't need guide plates but it's not clear if they require a special bolt or if the stock bolt will work. I like these over the speedway ones.

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  • SuperBuickGuy
    replied
    I bought bulk AC delco off ebay.

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  • 74NovaMan
    replied
    Seeing as I'm in the spending mood I've been looking at the last of the valve train parts I need.

    Lifter options:

    GM lifters from EBAY. $200
    https://www.ebay.com/itm/New-LS7-LS2...whQJc~ndk#rwid

    Summit brand lifters $154
    https://www.summitracing.com/parts/sum-htlskit

    Both come with new holders and the Ebay lifters seem like the way to go if they are actually GM


    Rocker Options:

    Summit Brand for $226
    https://www.summitracing.com/parts/sum-141556

    Some nice looking Speedway motors ones for $270 (once I buy the studs and guide plates)
    https://www.speedwaymotors.com/Stain...LS,326882.html

    For the price difference I'm leaning towards the Speedway.

    On the other hand, summit is running a 10% off Summit branded stuff (got that deal on the pistons and springs).

    Not really looked into pushrods yet.

    As always, I would love to hear your thoughts. Thanks.

    Leave a comment:


  • oletrux4evr
    replied
    And there is lots of swill available out there.

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  • SuperBuickGuy
    replied
    same decision path as I made... 10.9 is fine if you're not going to boost it, heck you could boost it, however 9.7 lets you run swill

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  • 74NovaMan
    replied
    Well I finally laid eyes on the other set of heads. They are 823 castings and very nice pieces. From the link SBG provided above:

    "LS7 Heads - These were the first heads to bring race car quality and technology to the OEM side. Although common in the aftermarket, CNC-porting of the intake and exhaust runners is usually too costly for a factory head. Titanium intake valves and sodium-filled exhaust valves were previously unheard of in a domestic factory engine, which revved to 7,200 rpm, another anomaly for a pushrod V-8. Right out of the box, these heads have supported more than 600 hp naturally aspirated and substantially more with forced induction. The large, raised runners and 12-degree valve angle enable substantial flow that supports large cubic inches ... the large valves necessitate a 4.125-inch or larger bore"

    In addition to being rectangle port intake heads (the intake I have is for cathedral port) the 4.125 inch bore requirement will not work on a 5.3.

    So we are using the 706 heads and our compression choices are 9.7 or 10.9. 10.9 seems a bit much and will be kind of on the edge for boost for me. 9.7 is the winner.

    Leave a comment:


  • 74NovaMan
    replied
    Originally posted by Russell View Post
    I have not been paying attention what was the reason for the rebuild? Is it getting boost, or maybe some day?

    Go with the small chamber heads.
    ​​​​
    https://youtu.be/gJCT5RvPCwM
    I was planning on a cam swap and found some milkshake in a corner of the passenger side head. So far we have not found a source for that as the head pressure tested fine. It may have been a head gasket issue. Teardown revealed the need for new pistons and it's snowballing from there. I'd like to leave the option of boost open since I'm so far in anyway.

    Leave a comment:

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