Originally Posted by danz
the sweetest way ive seen people do the mods ur looking for is to grind teeth into the valve like little blades and use that!!
This is the best thing to do. This is what we do to 1600 blocks using PM0 pistons (30.7mm CH with a fair amount of mid dome)
What's good about it is that you don't waste too much material on the piston. Once you've made the raw cuts, just clean up the surrounding areas of the new reliefs and get rid of sharp edges.
You might want to open them up just a hair for insurance against possible piston rock.
Clay also. And account for rod stretch.
Add: If i'd want to take it a bit further, I'll cut a junk head up to just one chamber then cut that piece again in the middle to get a clear side view of one intake and exhaust valve seat. I'll mock it up to the block set to tdc so i can see all the way through.
I've actually seen this in 2sohc's lab LOL