Hank, I'd love to buy my batteries wherever you're getting yours! If an engine is very low on compression those voltage numbers might be correct, I guess! I haven't seen battery terminal cranking voltages that high on a 12 volt system in 50 years of working on, and teaching automotive electrical systems.
On a 6-volt system, series resistance, which is the voltage drop from one end of a cable to the other, should be 1/10 volt per cable. Each connection should have an allowable drop of 1/10 volt, with NO voltage drop on the ground side of the circuit except for connections like the ground cable's attachment to the frame or engine block, and the battery terminal connection. For 12 volt systems, those measurements can double due to the higher voltage available to push current through the resistance. All these measurements should be made while the engine is cranking with the ignition disabled.
Jerry
