Patterned after the 1969-70 Ram Air IV Pontiac cylinder heads, these heads produce outstanding horsepower with excellent low-speed torque and throttle response.

Applications
1965-79 Pontiac 389-455 (high-performance street legal)
*Part number 350-60579 is 50-state street legal (E.O. #D-215-16)

  Shared Specifications

215cc intake ports

2.110" intake valve

1.660" exhaust valve

1.460" valve springs

Bronze guides

Hardened valve seats

5/8" thick deck surface

Spec Variations

72cc (for higher compression engines) or 87cc (for low compression using 92 octane)

.575" max lift

7/16" rocker studs

Tech Notes

The semi-machined version of the 72cc heads must be finished by a professional head porter. The heads come with valve guides and seats installed without intake pushrod holes.

High-flow, D-shaped exhaust ports require Ram Air IV headers or exhaust manifolds.

All factory accessory bosses are included for bolt-on convenience.

Installation requires Edelbrock head bolt kit #350-8556.

Recommended Edelbrock gaskets: 350-7381 (head), 350-7280 (intake), 350-7281 (exhaust)