Ford Performance M-6049-Z304DA 302/351W “Z-Head” Aluminum-Assembled 63CC for 1968-1973 Ford Mustang
Fits Vehicle:
1968-1973 Ford Mustang
SKU: M-6049-Z304DA
- 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 2.02″ intake M-6507-A304 and 1.60″ M-6505-B304 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 (Rocker Stud PN is ARP DRP154)
- 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
- Ford Performance M-9439-A50 intake manifold gasket recommended
- Uses Felpro® exhaust gasket part number 1487
- Felpro® VS13264T valve cover gasket recommended
- Check piston to valve clearance including radial valve clearance before installing these cylinder heads on your engine












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