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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » 363 carburetion and intake manifold.

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    6/12/2026 11:54 AM  #1

    boss347convertible
    FYI Addict

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    Registered: 4/22/2013
    Posts: 174

    363 carburetion and intake manifold.

    Per my previous post, the 347 suffered catastrophic failure and a 363 is going into the 66 with a manual transmission. The engine on order is Ford Performance m-6007-Z2363FT. Should note, first gear ratio 2.95, ring and pinion 3.55, 13 pound flywheel, and lightweight pressure plate.
    Copied from JEGS:


    • 507 HP on Pump Gas - In A 302 Sized Package
    • Engine Type 302 Based Small Block Ford; 363 cu. in. Displacement
    • 4.125 in. Bore x 3.400 in. Stroke
    • SCAT Forged Steel Crankshaft
    • SCAT Forged Steel H-Beam Connecting Rods and ARP Bolts
    • Forged Mahle Pistons w/Floating Wrist Pins
    • Hydraulic Roller Camshaft
    • Camshaft Lift 0.580/0.602 in. Intake/Exhaust
    • Ford Performance Aluminum Z2 Cylinder Heads M-6049-Z2
    • 2.05/1.60 in. Intake/Exhaust Valve Size
    • PAC? 1219X Ovate Beehive Valve Springs
    • Roller Rocker Arms w/1.65:1 Ratio

    Google will bring up further specifications on the engine. I spent some time talking with Ford Performance ("FP") technical support and FP recommends a 750 cfm carburetor. FP used a Holley 750 for testing, long tube headers and a super victor intake manifold. I ran a modified autolite 4100, shorty headers and a victor junior on the 347. 

    I am keeping the shorty headers and might port the victor junior. Even ported, the victor junior will not match the numbers the super victor flows. The FP tech estimated a 10-15 hp loss using the victor junior. The super victor will probably cause hood clearance issues; however, I might be able to mill the carburetor pad on the super victor. Have done this on FE 427 manifolds, but I don't know how much, if any, can be milled from the super victor.

    Most of my driving is at or near sea level and both victor manifolds are open plenum. The 347 created sufficient vacuum to activate the autolite 4100 secondaries using the victor junior.
    All of that said, looking for practical experience with an engine with similar specifications flowing similar numbers: mechanical secondaries vs vacuum secondaries?
     

     

    6/13/2026 5:17 AM  #2

    RTM
    Senior 24-7 FYI Addict

    Offline

    From: Cape Coral FL
    Registered: 5/22/2019
    Posts: 2,109

    Re: 363 carburetion and intake manifold.

    I sent my engine and drive train specs to ATM and had them build a custom carb for my engine.

     

    6/13/2026 6:07 AM  #3

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,987

    Re: 363 carburetion and intake manifold.

    Milling the carb pad down may negate any gain from the Super Victor.  High power engines seem to thrive on plenum volume (why most make 10-20 more HP with a carb spacer).  I'd talk to the folks at Wilson manifolds.  

    Carb wise, I'm with RTM.  I'd talk to folks who know more than I do.  

     

     

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