CYLINDER HEADS FORD 351C SRP ALLOY BARE 231CC INTAKE RUNNER VOLUME 72CC COMB CHAMBER, INTAKE VALVE 2.10", EXHAUST VALVE 1.65" USE PLUG AUT-3922

Material: 356 Alloy, T6 

Chamber Volume: 72cc

Intake Runner Volume: 231CC

Intake Port location: raised .125” 3V design 

Minimum Cross Section: 2.53 square inches MCSA 

Exhaust Runner Volume: 125cc - high velocity

Exhaust Port Location: Raised .080” (near stock location) 

Valve sizes: Intake 2.10” (45 degree seat, custom 5 angles)

                   Exhaust 1.650” (45 degree seat ) 

Valve Guide Angles: Canted Valve angles

                                 Intake 10 x 4 degrees

                                 Exhaust: 9.5 x 3.0 degrees 

Valve Guides: Manganese Bronze .502” x 11/32” stems  

Valve Seat Inserts:

                              Intake: 2.250” x 1.880 x 3/8 (Durabond 7000)

                              Exhaust: 1.680” x 1.430” x 3/8 

Spark Plugs: relocated for efficient fast burn

                    ¾ reach, 5/8 hex, washer seat (NGKBCP7ES) 

Spring Pads: 1.570” od/.560” id 

Valve Spring Height: 1.960” (with stock length valve) 

Pushrods: 5/16” or 3/8” (check required length)

Rocker Arm Studs: 7/16” unc