The Hudson rod needs a piston more or less 1.115" shorter than OEM. That CD length may exist, but not be something with a life expectancy. Deck height (to .000") = 50% of stroke + rod C-C length + piston compression distance. Piston to head .035" including compressed head gasket thickness. In a quench chamber "work with" is critical to no less than .035" and no more than .060" P-H. below that crashes the head when hot, above that has minimal knock suppression. I can't imagine how much a high compression dome for a 400" SBC does not resemble a GMC chamber.
