This beautiful solid billet timing cover includes a crank sensor boss used on 96-00 Vortec engines or if you want to run an aftermarket engine management system requiring a crank trigger, such as a 24X conversion.  This cover is much more rigid than the plastic Vortec cover, so you can run a cam button with no worries.  Machined in house from 6061 alloy, anodized Black for a look that will not pit or corrode.