505 XN6 head specs

Joe Grubbs (jsgrubbs@ipass.net)
Wed, 29 Jul 1998 01:59:46 -0400

I know I've asked this before, but I cannot find my notes.
Does anyone know the minimum thickness allowed on an XN6
head. Or, how much can I shave off an original.
Also, I'd like to use beefier valve springs--what other
engines use stronger springs that will also fit an XN6 head?
Any ideas?

Joe