Attempting to prime my new engine that I just installed, and it won't crank over. Figured it was the battery at first so I charged it for an hour or so, went to crank it and the starter just "clicked". Only once, not repetitively. So then I turned the motor over by hand, turned easily, no hesitations. Swap out a battery from my dad's 98 GT which is new, and now it doesn't even make the click noise. I'll check my connections tomorrow and see. Clean em up a bit. Note: the starter has been sitting in my house for ~8 months and there are Longtubes on it now so maybe it's arching out to the header..