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  1. #1

    Default which heads would you run?

    Any stock OEM cast iron cylinder head with a min. of 62 cc
    chamber, must be straight plug. Any aftermarket cast iron cylinder head with a min. of 72 cc
    chamber. Can run vortec heads but have to add 40lbs in front of firewall. Maximum.550 cam lift. Holley 4412 with factory specs only. No carb spacers allowed only a 1 inch adapter. Flat top pistons only, must use steel connecting rods, crankshafts can be steel but must be stock stroke. Full Roller Rockers are allowed. 362 cubic inch max.

  2. #2
    Join Date
    Nov 2012
    Location
    Wisconsin
    Posts
    3,119

    Default

    Well if you only have to add 40# with Vortec heads I'd run something like a Dart head. Few stock SBC heads will be as good with a .550 lift cam. You shouldbe able to get the compression up as high as you need it even with the 72cc rule. The guy who wrote that rule is a moron IMHO.

  3. #3
    Join Date
    Dec 2007
    Location
    Red Dirt USA
    Posts
    1,024

    Default

    I would look at Chevy Bowtie steel heads.They come stock with 64cc chambers. A lot of llm engines were built with these in my area. A flat top 358 generally makes about 535hp. Check out rules for NLMS series.

  4. #4

  5. #5
    Join Date
    Feb 2012
    Posts
    1,102

    Default

    bow tie ! i second that .

  6. #6
    Join Date
    May 2007
    Posts
    1,289

    Default

    Bowtie heads are ancient compared to new dart stuff. I'd run a set of platinums.

  7. #7
    Join Date
    Oct 2008
    Location
    Michigan
    Posts
    102

    Default

    535hp out of a 23 degree 362ci using a stock 4412, flat tops, and 72cc heads; = very good dyno.

  8. #8

    Default

    Dart heads are ok, but if you can find a comparable set of world, rhs, or pro topline heads you'll be much happier. For the build you're describing, I'd get a set with 200cc intake runners. Don't go any bigger than that. I run Rhs 200cc heads with a small solid f/t comp 4/7 swap cam(12-688-47) in a 358 in my ump modified and I love it. Very competitive motor as long as I stick to 3/8 or smaller tracks.

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