I open this topic to have some online assistance for my head porting.
My 351C 4V CC head had a bad repair see here http://pantera.infopop.cc/eve/...562/m/4111096556/p/1 iron guides were cracked.
I removed completely the old guide on one of the exhaust ports. Let me know what you think.
Next step is removing the booster ring on intake side, and I am wondering if it is really worth cutting the remaining guide boss that holds the bronze guide, maybe I should only reduce the OD diameter and give the right radiuses to reduce turbulence in the area ?


Intake side :

