Intro to a port job

thanks official
I had to save a set of chevy/ buick heads that were similar
lucky to have had the serdii and all the cutters
heads ended up at Bonneville
I did not do the porting so I have no idea how they came out
I use 30 degree seats a lot on low lift motors but as you said you have to open the chambers- which I usually do anyway even on 45 degree seats