See the following for seat position & underfloor reinforcement using spreader plates spot welded to floor & reinforcing angles:
http://www.flickr.com/photos/donpal/6418031687/
http://www.flickr.com/photos/donpal/6417968731/
See the following for electrical diagram that utilizes an underhood fuse box & circuit breaker:
http://www.flickr.com/photos/donpal/6418098429/in/photostream