Yeah really... It doesn't help much that the stock alt wire is roughly 90" and is an 8 gauge cable...

If you want to run that once in a while, you might be fine, you'd probably end up killing the alt and the battery.

But thats the cost of that much power in a car. You should definitely get a voltmeter in your car if you already don't have one, if your voltage drops much below 13.5 you need more alt.