Hi Peter. would you have a picture of your pistons, especially the tops? These ones that I am looking at 'are flat top with a cutout for just the , looks like the ex valve. The fellow that has them doesn't have much info on them, especially the comp ratio. No rings but pins and clips He is only asking 200 ( Canadian ) for the set, they are brand new I will try and get a picture for you.
Thanks,Rick