From:

http://www.thesuccesssolution.com/si...=98697&DL=5488

•CYLINDER HEAD SPECS:
CASTING NUMBER 14102193

SWIRL PORT INTAKE PORT DESIGN

65.3cc COMBUSTION CHAMBER

1.94" INTAKE 1.50" EXHAUST VALVE

VALVE SPRING PART NUMBER IS 3911068 (SAME SPRING USED WITH THE OLD 300H.P 350 CRATE)

INSTALLED HEIGHT 1.70" PRESSURE @ INSTALLED HEIGHT IS 80 LBS * PRESSURE WITH VALVE OPEN IS 267 LBS.

THESE SPRINGS ARE GOOD FOR .550" LIFT BUT CLEARENCE BETWEEN GUIDE AND RETAINER MUST BE DOUBLE CHECKED BEFORE ATTEMPTING.

7 BOLT EXHAUST FLANGE

CENTERBOLT VALVE COVER FLANGE

1987-1995 INTAKE MANIFOLD BOLT PATTERN WITH CENTER INTAKE BOLTS CANTED @ 72° ANGLE

THIS CYLINDER HEAD IS NOT A PERFORMANCE ORIENTED CYLINDER HEAD. IT IS CLASSIFIED AS A HIGH SWIRL HEAD THAT WAS INTENDED FOR GOOD BOTTOM END TORQUE AND FUEL ECONOMY. THE INTAKE RUNNER IS RESTRICTIVE BECCAUSE IT HAS A RAMP CAST INTO THE BOTTOM OF THE BOWL TO PROMOTE HIGH SWIRL.