here we go again... does anyone make 3 7/8

[Charlie ny]

Bored and Stroked does with cad what I attempt with laborious hand die grinding. The
method I use takes, on average,6 hours per head but exactly matches the comb
chamber to the piston crown. His statement is so correct.....'in many cases the head
head doesn't match the piston anyway'. After milling the heads I actually apply a thin
coating of grease to the piston crowns and valve heads then rotate the motor by
hand. The points of contact are readily apparent and are then carefully relieved.
Each head is hung on 4 studs to insure repeatability. The optimum .040 clearance
is sort of built in when the head gasket is in place at time of assembly.
Charlie ny