Ford Racing 302/351W Z-Head Aluminum - Assembled 63CC with 7mm Valve

M-6049-Z304DA7

• 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