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Part Number: M-6009-427F


The Ford Racing 427 shortblock lets you build it your way by adding your choice of heads, cam, intake and oil pan. It’s the perfect foundation to build a powerful 9.5″ deck engine for your vintage muscle car, street rod, Fox Body or Late Model Mustang. This is the same shortblock used in the 575 HP Z427 crate engine. Nothing but the best parts are used inside including: forged crankshaft, forged I-beam connecting rods with floating piston pins and the BOSS 351 block. This short block is hand assembled with performance clearances in the US. The 427 shortblock fits many of the vehicles originally built with Windsor and Cleveland small blocks.

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RPM Price: $4,600.00 $5,449.00

  • Engine type: 351 based small block Ford
  • Engine type: 351 based small block Ford
  • Bore x stroke (in): 4.125″ bore x 4.00″ stroke
  • Block: Boss 4-bolt main block M-6010-BOSS35195  9.5″ deck height
  • Mahle forged aluminum 4.125″ bore pistons with valve reliefs for Z304, N351, GT-40 and other inline valve Windsor cylinder heads. 17cc effective dish volume, check piston to valve clearance
  • .005″ below piston to deck height nominal
  • SCAT 4.000″ stroke forged steel crank
  • SCAT forged steel H beam connecting rods with floating pin
  • Hydraulic roller camshaft compatible
  • Neutral Balance rotating assembly
  • Recommended cylinder head fasteners M-6065-BOSS head bolts, M-6014-BOSS studs, or M-6014-Z304 studs, depending on application
  • Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads
  • Assembled and ready for your heads, cam and timing chain set
  • Requires head gaskets M-6051-R351
  • Built with all NEW PARTS
  • Photo and specs may vary

PART TYPE:              Engine: Short Blocks

INSTRUCTION SHEET:         Available


PACKAGED DIMENSIONS:  31″ x 24″ x 25″

PACKAGED WEIGHT:            304 lbs.

CATALOG PAGE #:                  171

UPC CODE:                             756122117231


This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions. Read More Here!

Not all Ford Performance Parts may be installed on vehicles that are driven on public roads. Click here for more information about compliance with emissions standards.