Performer RPM Ford
Cylinder Head Specifications #60229 & #60259

Combustion chamber volume 60cc
Intake runner volume 170cc
Exhaust runner volume 60cc
Intake valve diameter 1.90" & 2.02"
Exhaust valve diameter 1.60"
Valve stem diameter 11/32"
Valve guides Manganese bronze
Deck thickness 5/8"
Valve spring diameter 1.46"
Valve spring maximum lift .575"
Rocker stud 3/8"
Guideplate Hardended steel
Pushrod diameter 5/16"
Valve angle 20°
Exhaust port location Stock
Spark plug fitment 14mm x 3/4 reach, gasket seat
Made In USA
Designed for non-emissions 289, 302, and 351-Windsor Ford engines Maximum performance in the 1500-6500 rpm range for high performance street
1.90" intake valves are for use with stock pistons and high-flow 2.02" intake valves work with pistons notched for valve clearance

Technical Notes: Hardened pushrods required, use Edelbrock #9632 (flat tappet only). Will not accept rail rockers. 289-302 V8s require Head Bolt Bushings #9680 and either Head Bolt Kit #8552 (7/16") or stock head bolts. Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing & a valve job to match the valves you will be using. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
 
Description Bare (Single) Complete (Single)
Performer RPM with 1.90" intake valves (with springs for hydraulic flat tappet cams) 60219* 60229*
Performer RPM with 1.90" intake valves (with springs for hydraulic roller cams) 60219* 60225*
Performer RPM with 2.02" intake valves (with springs for hydraulic flat tappet cams) 60249* 60259*
Performer RPM with 2.02" intake valves (with springs for hydraulic roller cams) 60249* 60255*
Performer RPM with 2.02" intake valves with Polished finish (with springs for hydraulic flat tappet cams) N/A 602519*
Performer RPM with 2.02" intake valves with Polished finish (with springs for hydraulic roller cams) N/A 602515*
Performer RPM (Super Stock only) 60217* N/A
 

Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench #60229
Valve Lift .100" .200" .300" .400" .500" .600" .700"
Intake 72 132 183 216 245 249 244
Exhaust 57 104 142 159 170 174 175
 

Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench #60259
Valve Lift .100" .200" .300" .400" .500" .600" .700"
Intake       70      128   183   219   251   255   246
Exhaust    57      104    142   163   170   174   175