347 CUBIC INCHES 450 HP BOSS CRATE ENGINE REAR SUMP

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347 CUBIC INCHES 450 HP BOSS CRATE ENGINE REAR SUMP
M-6007-Z347
Instruction Sheet
Available (PDF)
WARNING: Cancer http://www.p65warnings.ca.gov.
  • 347 cubic inches
  • 450 hp @ 6000 rpm (with headers, and a 650 CFM Holley carburetor not included)
  • 400 lb.-ft. @ 4900 rpm
  • 9.7:1 Compression ratio (nominal)
  • Forged pistons
  • Forged steel cap screw connecting rods
  • Hydraulic roller camshaft, .580" lift intake .602" exhaust, duration at .050" is 232 degrees intake and 240 degrees exhaust
  • Double roller timing chain M-6268-A302
  • Forged steel crankshaft
  • Boss 4-bolt main block M-6010-BOSS302
  • High-performance rear T-sump oil pan
  • Rear sump pan fits most Fox body cars
  • MSD billet distributor
  • Ford Racing aluminum "Z" cylinder heads M-6049-Z304DA with 2.02" intake valves and 1.60" exhaust valves
  • Roller rocker arms 
  • Single plane Victor Jr. intake manifold M-9424-D302
  • New Boss block, oil and water pumps, performance oil pan, and high-performance harmonic balancer
  • Can be used in kit cars, street rods, Mustangs, Fox-bodied cars, and trucks
  • See our NEW "Z" Headers designed for an easy install in a Fox body M-9430-ZM7993 or ceramic coated, M-9430-ZM7993C
  • Depending on your application, a different timing cover, water pump, performance oil pan and pickup may be required. See installation notes INSTALLATION NOTES: See engine installation and tuning tips on page 40. Some or all of the following items may need to be changed from your original engine or modified for proper installation:
  • This engine has a rear T-sump performance oil pan and pickup, regular rotation timing cover and regular rotation water pump, and non-EFI valve covers.
  • A different performance oil pan and pickup may be required for your application. Call the Techline at (800) FORD788 for more information.
  • The timing chain cover will work with most regular rotation water pumps.
  • Fuel pump eccentric M-6287-B302 installed, allows use of mechanical fuel pump
  • A standard rotation water pump is installed on the engine. Other applications may require different water pumps and timing chain covers found on pages 139-140.
  • The valve covers M-6582-BOSS should fit most non-EFI applications, optional valve covers (sold separately) are available on pages 144-147.
  • The damper M-6316-C351 may require a spacer for pulley alignment, see page 142.
  • The flywheel M-6375-A302B included should work for most 157-tooth manual transmission applications. For other transmission applications use the proper 28 oz. flywheel, see pages 188-189.
  • Firing order 1-3-7-2-6-5-4-8 (5.0L HO and 351W order).
  • Built with current available parts. Photo and specs may vary.
  • Shipping weight approximately 560 lbs See Also...
  • Crate Engine Build-Up
  • Crate Engine Warranty
  • Engine Tips & Specs
  • Crate Engine Catalog
Part Type
Engine: Complete Engines
Instruction Sheet
Warranty Availability
Package Dimensions
36" x 38.75" x 36"
Package Weight
560 lb(s)
UPC Code
756122099346
Country of Origin
United States