Did you modify your heads to take the Dome pop up pistions? I wasn't sure from your description if that was the case. The reason I ask is that I'm working on a swap for a pair of 69R heads, new, that are meant to be used with the domed pistons. Course I don't have the pistons, but it's a start. I'm really impressed with your relieving work, I presume that's what was described in the kr racing manuals?
Thanks for any info.