[67cruiser]

First off, ive replaced every wire harness on my 67 gto and still if i leave the batt. connected for 1 1/2 days its dead, something is drawing the charge out of it, I cannot see disconnecting one thing at a time to find the problem. Isn,t there a better way of checking it out?? When i connect my positive after my neg. batt. terminal, i see a faint spark on the post, what options do i have and does anybody have any ideas here??