Re: Cylinder head questions

Posted by PackardV8 On 2014/9/9 18:50:27

Forget the hardened seats unless u're running aluminium heads or plan sustained high rpm under extreme heat conditions. Doesn't matter even if running ss valves. SS valves in my 56 Exec and 25k+++ miles no problems. No hardened seats. routinely run in middle tn. at 70+ mph.