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Ford Performance 347 Cubic Inch Boss Short Block

Item 399341
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      Product Information

      Features, Description, Q&A, Specs & Installation

      Features

      • Ideal for Building an 8.2 in. Deck Engine
      • Based on the Ford 302 Small Block
      • Displacement of 347 Cu. In.
      • Comes Pre-Assembled and Ready for Installation
      • Compatible with Most Aftermarket Performance Cylinder Heads
      • Built with All New Parts
      • Sold Individually
      • Requires Head Gaskets M-6051-CP331 or M-6051-S331 – Sold Separately
      • Fits All Ford Mustang Models

      Description

      A Great Foundation For Mustang Engines. The Ford Performance 347 CI Boss Short Block lets you build your ideal engine with your choice of heads, cam, intake, and oil pan. This block is used in Ford Performance 347 Sealed Racing Crate Engines. It features high-quality performance components like forged crankshafts, forged I-beam connecting rods, and the BOSS 302 block. With such a high-quality performance foundation, building your ideal engine is that much easier.

      Assembled with All New Parts. The Ford Performance engineers ensure that all the best parts go into the 347 CI Boss Short Block. It incorporates parts from trusted vendors like SCAT® and Mahle® to give it the performance and reliability that a racing engine needs.

      Pre-Assembled and Ready for Installation. This short block is already assembled and ready for your heads, cam, and timing chain set. Note that the pistons are designed for 20-degree valve angle heads. Installation requires head gaskets M-6051-CP331 or M-6051-S331 which are sold separately.

      Application. The Ford Performance 347 CI Boss Short Block is designed to fit all Ford Mustang models.

      Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Details

      MPN# M-6009-347

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Questions & Answers (7 answers)

      5 Top Rated Questions

      Are the reliefs cut large enough In the pistons to accommodate larger cams and larger valves? Or are they the same size as factory stock reliefs? Also, what CR with various cc heads?

      Is this short block built using forged Scat internals?

      • The Ford Performance 347 CI Boss Short Block is built using SCAT® forged steel crankshafts and connecting rods, as well as Mahle® forged aluminum piston rods.

      Helpful (0)

      Is this short block or the 363 version compatible with trickflow twisted wedge 170 heads?

      • The valve reliefs will be designed for standard in-line valve heads, limiting your cam selection with trick flow twisted wedge heads. Additionally we would recommend heads with at least a 185cc intake runner.

      Helpful (0)

      Made of iron?

      • The Ford Performance 347 CI Boss Short Block is a constructed of cast iron.

      Helpful (0)

      Will this be able to fit my 4.6l 2v sohc and what problems might I encounter?

      • This block will fit in any model mustang and will require custom work and fabrication for it to work.

      Helpful (0)
      Post Your Question
      2 More Questions
      Would u be able to bolt the original heads and transmission, pullies, intake, injectors, erc 1 answer
      Big bore? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Assembled Short Block

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • Bullitt - 01, 08, 09, 19, 20
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 01, 03, 04
      • Cobra R - 93, 95, 00
      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 07, 08, 09, 10, 11, 12, 13, 14, 20
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 79, 80, 81, 82, 83, 84, 85, 86
      • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17

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