The factory had the cam retarded 5 crankshaft degrees on all the big Healeys. Offset keys are required when grinding a performance cam. NITRIDING IS STRONGLY RECOMMENDED OH ALL AUSTIN HEALY PERFORMANCE GRINDS. ROCKER ARM RATIO= 1.45:1 (AVG.)

Longer duration cams are available for all-out racing applications. The edge of the cylinder may need to be relieved for the valve to block clearance with cam lifts of 290 or greater. Nitriding (heat treatment) is required on all but stock grinds.
Window Visors Rain Guards for 1999-2006 Chevy Silverado/GMC Sierra 1500/2500/ 3500/ 2500HD, Window Vent Wind Deflectors Visors Shades for 2007 Silverado/Sierra Classic Model - Extended Cab
$36.99 (as of July 12, 2025 14:00 GMT -07:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)【Vehicle Fitment】YQAUTEC 4PCS Window Visors Rain Guards Shield fit for 1999-2006 Silverado & Sierra 1500 2500 3500 2500HD Extended Cab, Side Window Vent Wind Deflectors Visors Shades for 2007 Silverad... read more
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