FORD RACING"SPORTSMAN" SHORT TRACK CAST IRON CYLINDER HEADS

M-6049-N352 cylinder heads have not
been approved for the NASCAR Late Model
Stock Series

Several casting and machining changes
have been incorporated in the improved
N351/N352 cylinder head to improve
durability and flexibility

M-6049-N351/N352 have internal posts
and ribs added to improve head gasket life
by reducing head deck flexing

M-6049-N351/N352 have material removed
over the intake ports to reduce weight

M-6049-N352 has improved valve seat
machining to reduce"sinking" the valve seat
too far into the port

M-6049-N352 has reduced intake and
exhaust port volumes to better suit the
smaller displacement engines (302 CID) and
351 CID engines with limited modifications
that are the most popular basis for entry level
oval track applications where these heads
are used

M-6049-N352, intake port volume reduced
8cc with no reduction in flow due to removal
of the bump required in the current port for
pushrod clearance

M-6049-N352, exhaust port volume reduced
3cc with no reduction in flow to restore
the port size near the valve seat which had
gradually increased due to core box wear

These heads use .708" reach tapered seat
spark plugs depending on application

INSTALLATION NOTES

Requires M-6564-F351/J351 roller rocker
arms with offset intake valve pushrod cup

Unique header flange required

Must use head bolt kit M-6065-C351
to install cylinder heads

Parts to assemble M-6049-N351*:
M-6566-D351* Pushrod guideplate (pkg. of 8)
M-6527-C311* Rocker arm studs (pkg. of 16)
M-6505-A351* High-flow stainless steel exhaust valve
M-6507-A351* High-flow stainless steel intake valve
M-6514-A50* Retainers (pkg. of 16)