• Fits 302/351 Windsor engines
  • Cast from prime A356 T6 aluminum
  • Heads are cast with high-flow ports
  • 20 degree inline valves
  • Premium stainless steel lightweight 7MM 2.02" intake M-6507-D3047 and 1.60" M-6505-D3047 exhaust valves
  • Uses PAC 1219X conical style valve springs with machined retainers and machined valve locks. Most hydraulic cams can be used with these springs.

    ·Valve spring closed pressure - 145 lbs. @1.800"

    ·Valve spring open pressure - 358 lbs. @ 1.175"

  • Includes laser cut guide plates M-6566-Z304D for use with 5/16" pushrods and 7/16" rocker studs
  • Steel alloy intake and exhaust valve seats
  • Manganese-bronze valve guides
  • 63cc CNC'd combustion chamber
  • Intake port volume as cast: 204cc
  • Exhaust port volume as cast: 85cc
  • Accepts both tapered seat and gasket style 14mm spark plugs (Motorcraft AGSP-32-PP, Autolite 3924, 3925)
  • Requires 1.65:1 or 1.5:1 ratio roller rocker arms with .150" offset intake pushrod cup (not included)
  • Raised exhaust port exit, custom headers may be required
  • Check piston to valve clearance including radial valve clearance before installing these cylinder heads on your engine
  • Uses Felpro® exhaust gasket part number 1487




Part Type
Engine: Cylinder Heads
Instruction Sheet
Warranty Availability
Not Available
Package Dimensions
9.5" x 7.5" x 21.5"
Package Weight
31.8 lb(s)
UPC Code
Country of Origin
United States