Can we ask why you are looking to make a change?

As far as I know there is nothing there. You can drill a new pin hole but,,, and it's a big BUT,,

Unless you are building an engine like LSR Mike has there is no need to mess with cam timing. You can cause lots of problems.
My engine cam is advanced 6 deg but then again it's built for the cam. It's a V6 with the biggest cam I could get then another 0.005 added to the lift along with 10-1 compression and 1.5 roller rockers and roller lifters a 500CFM carb with MSD zappers and limiter.


A 2, 4, or 6, deg shift is not much movement of the cam. So be careful what you do.