[3W Hank]

-I always asked myself that when I worked with the 426 Hemi for decades.
Heard about them, but never saw one in person.

I bought heads from Modesto but when a aluminim head was legal in stock class I had no one do my heads so this tool get the chamber bigger in diameter as if a modern pistons and max bore they could not pop up Ok.
Old way ( big dome ) was modify the dome to chamber ( by hand ) but not legal.
Now pistons need a number.
I had the blueprints from CP ( not easy… ) then I got Hemi blue prints from BHJ and bought their blueprint TQ plate.
Then I machined chambers in CNC.
Bored block with plate on ( as new block it was good ) and machined heads with plate on ( not as good ) as I did like exact centre as its tight for piston to head ( otherwise lose comp ) and as good rods ( incornel bolts ) I had little over 0.04” and near 9K RPM.
A huge work… from a big chamber tool..in a Bridgeport mill.

I has ask on FH blue prints but I has never seen them.
My idea if a drawings I CNC machine head the whole chamfer and 3D out dome and ask Ross the cordinates.
Cordinates is only 1 line in X and Z and a R from a starting point in X/Z, but I guess hard or impossible get them.