Designed for use in racing applications where cast iron heads are mandated or for larger displacement small block street-type engines, World’s 220cc intake MOTOWN heads are the ULTIMATE cast iron SBC head.

Employing RightCast ports, big 2.080” diameter intake valves and a highly efficient 64cc combustion chamber, the MOTOWN provides significant power increases over other heads on the market.

They are ideally suited for use on small block Chevy engines of 383” or larger displacements.

Available bare or in complete assemblies, as well as in straight or angle-plug configurations.

Casting ID Number: I-038
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valves: Manley stainless steel valves in assemblies
Valve Diameter: 2.080"" intake, 1.600" exhaust (11/32" stem)
Guide Plates: Stock
Rocker Arm Studs: Screw-in style
Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
Intake Runner: 220cc, standard port location
Exhaust Ports: 70cc, standard location
Combustion Chamber: 64cc, straight or angled plug orientation
Spark Plug: 14mm 5/8" .460" reach tapered style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised w/ perimeter and center bolt pattern
Valve Angle: Stock 23°
Accessory Bolt Holes: Stock Accepted by most oval tracks and sanctions. Check with rule book.

Spring Specs
1.437": 125 lbs. @ 1.810", 340 lbs. @ 1.210", coil bind @ 1.160", max lift @ .600"
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift @ .700"

Head Flow @ .700 Lift
273 intake, 192 exhaust (Super Flow 1050)
290 intake, 210 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.