V8 Cylinder head questions

Posted by 64avanti On 2014/9/9 11:27:05

In going over my 352 heads that were rebuilt, I may have some of the intake seats touched up due to the way the valves contact the heads. This got me to thinking, is there a spec for valve stem height when the seats/ valves are ground? My engine guy is unlikely to have this measurement for a Packard.
Also, what is the likelihood of hitting water when installing hardened exhaust seat inserts. One of my "consultants" is worried about this.
Lastly, has anyone ever flow tested these heads with the Exhaust port crossovers on #s 3&5 and #s 4&6 filed w/ Aluminum and reshaped? This is worth a gain on Olds & Pontiac V8s, though I will not be pursuing this on my engine.
Just wondering in case of HP applications.
Thank You Gentlemen.