would 2/0 AWG wire from West Marine be suitable for a 1941 Ford 6v system

[hueyhoolihan]

on my new-to-me 1941 ford convertible, i will be installing as a first step, new battery cables. so am gathering information and recommendations. tell me what you think. would AWG 2/0 (double 00) sized wire from West Marine do the job?

previous owner put in a 8v battery and a new starter and bendix to help address starting issues. but the starter still hesitates for almost a second on every push of the button, but after that one second struggle, the starter does turn over the engine without further hesitation fast enough to start the car. but i refuse to believe that such silliness (i.e. the 8v battery) is necessary. in fact, i find it hard to believe it won't be damaging...so will be replacing the 8v battery with a 6v battery too

i may even throw in a new 6v voltage regulator just in case the previous owner ruined it in a futile attempt to force it to function properly with the 8v battery.