duster sparks from battery ground

LET US BE CLEAR..............

WHERE are you grounding the battery?

It MUST be grounded to the engine block in order to crank

This means a trunk mount battery must have a jumper from the engine block to the car body (in the case of Mopars, which have no frame)

If there is a "small" spark every time you connect/ disconnect the battery, this means you have something drawing current. Make sure everything, key, dome lights, any other accessories "not" through the ign switch are off

To find the drain/ draw, put a test lamp in series with the battery ground. It will light more brightly depending on the amount of the draw. Disconnect fuses one at a time to find. If all fuses are out and you still show a draw, think about what else you might have hooked up---an aftermarket stereo, separate amp, anything you have added. Try disconnecting the alternator output stud.