Head Porting Advice

Hey Fishy, how about the intake ports? I need some more advice before I call it finished and start assembling the heads. Here are some pictures, should I make the curved walls as straight as I can? My friend told me that I could take as much needed to make the curved walls straight as long as I don't go through it. My concern here is, where are these heads prone to cracks? Don't want to weaken them. He said the port runner walls don't get that hot and shouldn't worry about cracks there.

I didn't take any more out of mine that what yours look like now because I didn't have an accurate tool to measure how much material was there and didn't want to break through. The pushrod pinch is quite profound on Iron Rams but from everything I've read it doesn't make a huge diff. in flow if you take out the most you can. Mine peaked at 270 with port openings and bowls that look like yours. It seemed like I didn't gain a lot for all the time I put in because OOTB they flowed 250. But... the flow increase started with +8 cfm at .200 lift and increased exponentially from there and the low lift numbers are what are most beneficial.