T3: Porting and polishing

[Brooks County High School <brookc3@datasys.net>]

The reason to port a head is obvious, increased air flow.  The reason 
for polishing is to reduce friction.  Friction in the intake does 
promote swirling of the fuel/air mixture which prevents puddling of the 
fuel in the intake and ports.  Polishing of the exhaust allows the 
exhaust to escape more quickly which creates better scavaging and 
reduces back pressure.  A good porting of the intake along with matched
manifolds and gaskets will do ANY engine good.