276 stroker from 35 years of parts

[GB SISSON]

I have a couple well worn .030 blocks and pistons. I found that with 60 grit adhesive sandpaper on a .030 piston, the contour is exactly the same as my .125's crown. I have a ton of rods so I cut one off and welded a 7/16" bolt on for my drill. Bolted one of the merc heads on, rolled the old block upside down and gave it a try. 3 items of note.
1) there is a step in the top perimeter of this junk piston that keeps the paper from grinding the last 1/8" from bowl's O.D. I leveled that step with epoxy tonight for tomorrow's run.
2) I had to cut a notch outa the junk pistons skirt so I can tilt the piston around some close bearing boss' and introduce it from bottom of cylinder.
3) I need to leave a dime sized 'no sandpaper zone' on top of the bowl grinder piston tool, but what you see was done with this sandpaper configuration. This will leave a center hump that I can carve out later with my angle grinder.
I unbolted the head and tested what you now see with a combination of foil balls and foil snakes and I'm 1/2 way to where I wanna be on this initial attempt. The areas with .018 quench are now about .025. As you can see, most of the meat is coming out of the middle ground. I'm cautiously optomistic, but happy with the initial findings. To be continued.