Purple Shaft lash question.

We've seen great results with the solid purpleshaft cams by advancing them, even with good custom 8" converters. I had the 590 cam in my big block, advanced to 104.
My friend kept advancing the 557 cam in his small block and the car kept going quicker, he ended up at 100. It's something you have to play around with but I think it's very safe to advance them 2 degrees, especially since the timing chain will eventually stretch a little.