Am i mad people?

i have a 1.3 kent with a racing head so the inlet valves 41.5 mm and the exhaust is 32mm

The pistons are escort 1.1 to raise compresssion

the valves are catching slightly on the edges of the pistons

can i grind out the pistons slightly so they clear with a dremmel or something
make sure they all weigh the same and file off any sharp areas?

would this work?