I have built a fully articulated jeep wrangler rock crawler (SAS), a FJ Cruiser rock crawlers (IFS) Full size Dodge 2500 Diesel trucks (SAS) and now thinking about purchasing a 1997 Lexus 450 with full mods for wheeling. (SAS) It seems the heavy diesel engine trucks are not the best for crawling, and the FJ Cruiser has a weak front end with the Independent Front Suspension. I am a big guy and getting into a 91' Jeep Wrangler is tough duty. What opinions do you all have?