Actually, if you have the typical factory stock Mopar ammeter/ bulkhead connector wiring, it CAN strain the wiring, because two big "high cranking amp" batteries can behave with a lower charge impedance that a single, smaller battery.
If you try and compensate with a larger alternator and the factory wiring, you are inviting trouble. Time to read the MAD article on the subject:
But you MIGHT want to read the race rules now that we know what you are after. I believe NHRA only allows ONE battery in some classes, but I could be wrong.
From the 2011 rulebook:
"A
maximum of two automobile batteries, or 150 pounds combined
maximum weight (unless otherwise specified in Class
Requirements), is permitted"
