Thoughts on the 452 heads

Please give great consideration to what PRH/Dwayne is saying. I think the first porting I did was 59 years ago on a Clinton A-490 two stroke engine for my go-kart. We've made well over 700 HP on pump gas with ported factory iron heads.......but damn was it a lot of work. My experience tells me Dwayne knows what he is talking about.