Edelbrock Cylinder Head, 60139 Performer, AMC/ Jeep 343-401 V8, with Exhaust Crossover

The Edelbrock #60139 RPM cylinder head is designed as a bolt-on performance upgrade for any 1967-91 AMX, Javelin or Jeep with a 343, 360, 390 or 401 AMC V8 engine. They include adjustable rocker studs and guide plates set-up for use with small-block Ford style adjustable 1.6:1 ratio rockers. The intake flange is dual-drilled to accommodate early and late model intake bolt patterns, covering 1967-91. A Complete head includes larger than- stock valve springs to handle most high-lift cams. They feature stock location ports for compatibility with standard manifolds and headers. A direct bolt-on for 1970 and later engines with 1/2" head bolts, This head includes step-dowel pins for pre-1970 engines. Their dual-quench combustion chambers produce approximately 9.5:1 compression in 401 V8 engines. The 45deg intake seat angle offers improved mid- to high-lift flow over the stock 30deg angle.

Installation Notes

Use Edelbrock Step Washer Kit #9693 on 1967-69 engines with 7/16" head bolts.

Includes adjustable rocker studs and guide-plates for use with Small-Block Ford-style adjustable 1.6:1-ratio rockers.

Intake flange is dual-drilled to accommodate early-and late-model intake bolt patterns, covering 1967-91.

Direct bolt-on for 1970-later engines with 1/2" head bolts, these heads include step-dowel pins for pre-1970 engines.

5/8" deck thickness, 3/8" rocker stud diameter, 5/16" pushrod diameter (width of slot in guide-plate)