After thought: A big six would not only look great under the hood but, EVERYTHING is so easy to get to and you have plenty of room to add A/C, oil coolers etc.. A big plus for me is installing a A/C heater combination from a 2016 Lexus. NO water hoses required for heat, it's all electric. You will have to have 12 volt system unless you use a split system. My 54 has two large deep charge 6 volt batteries. One six volt runs all the lights and 6 volt generator charges both batteries but runs the 12 volt a/c, heater. I still use my six volt starter which is a high amp armature and field coils but it only takes about two seconds to start engine. I always keep a 12 volt starter in the parts room. So much you can do, Hotrod Lincoln and Tc to mention a few are a wealth of knowledge. They have forgot more than I will ever know. Doc.