PIN POINT PISTON MARKER
I took these broken off valve stems and ground the tips to a point to mark valve centerlines on pistons for flycutting valve reliefs. Just install the head on the block and insert the stem in the guide point down and with the piston at TDC, give it a slight tap and you now have a reference point for machining

Rich Jones
Redline Automotive Competition Engines
Davie, FL
December, 2018