Valve Lift Specifications

Engine/VIN Year Int. Exh.
4.3L/V6-262/Z 1989-90 .350 .385
5.0L/V8-305/E 1989-92 .350 .385
5.7L/V8-350/7 1990 .385 .404
5.7L/V8-350/7 1991 .413 .428
4.3L/V6-262/Z 1992 .350 .385
5.7L/V8-350/7 1992 (1) (1)

(1)- Except police models, intake .350 inch, exhaust .385 inch. Police models, intake .413 inch, exhaust .428 inch.