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FE Power Forums => FE Technical Forum => FE Engine Dyno Results => Topic started by: My427stang on August 26, 2026, 04:59:29 PM

Title: Bullock's Power Service - 347 SBF - 421 HP / 437 TQ
Post by: My427stang on August 26, 2026, 04:59:29 PM

Hot little 347 for an AOD 4x4 early Bronco, should be an easy engine to love

https://youtube.com/shorts/MyAduEClTIk

Performance Summary:
      Cubic Inches:  347            Dyno brand: Stuska
      Power Adder:  N/A             Where dynoed:  Harry Heads, Sioux City, IA
      Peak Horsepower:  421.5 @ 5800
      Peak Torque:  437.1 @ 4500

Engine Specifications:

   Block brand, material, finished bore size, other notes: 73 Ford 302 iron, 4.030, CnC squared, .045 quench
     
   Crankshaft brand, cast or forged, stroke, journal size: SCAT cast 3.400 28 oz imbalance
     
   Connecting Rods brand, material, center to center distance, end sizes, bolts:  SCAT 5.400 I-beam

   Piston brand, material (cast, hypereutectic or forged), dish/dome volume, static CR: Mahle 1mm/2mm

   Main Bearings, Rod Bearings, Cam Bearings brand and size:  King main and rods, Durabond cam bearings

   Piston rings brand, size, other notes: Mahle 1.0/1.0/2.0

   Oil Pump, pickup, and drive:  Melling HV, ARP drive, Ford rear sump pickup for Bronco

   Oil pan, windage tray, oil filter adapter:  Ford pan for Bronco

   Camshaft brand, type (hyd/solid, flat tappet or roller), lift and duration (adv and @.050"):  Custom Bullock's Power hydraulic roller, 219 @.050 intake, .560 lift, 112 LSA on 106

   Lifters brand, type:  Ford Racing with Comp Cams Spider

   Timing chain and timing cover: Cloyes billet, stock cover

   Cylinder heads brand, material, port and chamber information:  AFR 185, blueprinted for spring pressure and Manley seals

   Valve springs: AFR 145 seat, 390 open
 
   Rocker arm brand, type (adjustable or non-adj), material, ratio: Owner supplied aluminum

   Rocker shafts and stands, brand, material:  AFR

   Pushrods brand, type, length:  Custom Smith Brothers 5/16, .116 wall call/cup oiling

   Valve covers, brand, type:   Ford Racing aluminum

   Distributor brand, advance curve information:  Holley Dual sync (dyno'd with Blueprint Engines MSD copy)
 
   Harmonic balancer brand: Scott Drake

   Water pump brand, type (mechanical or electric):   Iron Tuff Stuff, electric on dyno

   Intake manifold brand, material, porting information:  Edelbrock RPM Air Gap, some mild port work and plenum cut for IAC motor access to both banks

   Carburetor(s) brand, type: 550-872 Sniper (dyno'd with 650 double pumper)

Title: Re: Bullock's Power Service - 347 SBF - 421 HP / 437 TQ
Post by: Mr Woodys Garage on August 27, 2026, 09:20:08 PM

Very Nice Build. Someone Will Have LOTS Of Fun With This!