Q's on porting lt4 heads?

Does any one know how the exhaust valve bowl is supposed to be shaped?,the valve bowl as cast is shaped like a v,should this be radiused out torwards the exhaust?, also just under the seat there is a abrupt angle heading torwards the exhaust,and grinding the seat to the optimum 90% of valve size will probabaly not clean this up!,also the intake runner has 2 protrusions in it ,the rocker arm stud as cast and a (to a lesser extent)a coolant passage torwards the intake bowl,can these be ground out?,I guess you would have to know lt4 heads to know what Im talking about ,Id have them done proffesionaly but Iv got enough money in my car!!,and as we all know,cars are not money makers!

Thanks
WP