i would either do yota or full custom. Mustang II is another feasible option but pricy. it would be really easy to buy a complete toyota front clip and build all 2x3 rails under the cab and bed. i would recommend that to anyone over a full 2x3 frame unless you have ALOT of fabrication and suspension experience. The first 3 feet of frame are the most complicated. you have to take into account the core support, the engine crossmember, steering, control arms and mounts, motor mounts, and everything else. the control arm mounting locations have to be correct, steering geometry must be correct, there are so many different factors in a full custom build. plus there is alot of work done that most people dont notice. unless you understand the ackerman principle and how suspension geomerty works (caster, camber, toe, bumpsteer, etc.) i would go with a yota clip. you can get one from a junkyard for fairly cheap. 98+ ranger stuff is ok for bagged trucks that arent that low. with 98+ ranger clip, you still have an engine crossmember that hangs far below the frame plus a spindle that is a mile tall. 98+ rangers with big wheels and bodydrops have camber just as bad as an ibeam truck if not worse.