Enginetech Part Number: EHC293 Bare Cylinder Head Fits GM/Chevrolet 4.8L/5.3L Casting # 706,862 61cc Chamber .3154 Guide ID Valve Head Diameter: Intake 1.890-1.920 Exhaust 1.550-1.580.
Enginetech Part Number: EHCR287L Bare Cylinder Head (Left Hand) Fits Chrysler & Jeep 4.7L 287 With Or W/O Egr. Ex. Ho J With or Without EGR .2752 Guide ID Valve Head Diameter: Intake 1.917...
Enginetech Part Number: EHCR287R Bare Cylinder Head (Right Hand) Fits Chrysler & Jeep 4.7L 287 Ex. Ho J .2752 Guide ID Valve Head Diameter: Intake 1.917 Exhaust 1.457.