have you put HD electric truck cables on battery to engine earth,and starter to solenoid,to battery positive. DDL have these or you can do what i did and get the cables made up by a local autoelectrician.be careful when tightening the startermotor bolt as it's easy to stripthe thread on it,by overtorqueing it,and it was new starter motor for me!
Worth it though as electrics are great now,with no delay between pressing starter button and turnover.Get a voltmeter as well as this'll keep an eye that reg is charging ok.
Any joy with the photos of the fenders? u can text me photos to my mobile if u have a camera phone. am on: 07941130647.