[i]...i used 10ga wire to route the positive cable from the firewall back...what is my problem? [/B]
There's your problem......not enough juice going thru that small wire to turn the starter over. I would use no less than 4 gauge for the power wire......some use 2 or even 0 gauge, but you're not cranking over a bug V8 so I think it's overkill......need to get larger wire man....
-Bill