maybe put some wheels on the frame and see what the track width will be compared to the fender width. it gets spendy when you have to buy custom offset wheels. always good to stick with something that is relatively easy to find, like stock wheels for an S10 or Camaro or whatever. the taller the truck sits off the ground the easier it will be to tuck the wheels under it and not have rubbing issues. it is best to have the suspension at full compression, at some point, and then turn the steering to see if the wheels will interfere as the steering goes from lock to lock.
if you need to have spacers or weird offsets to get the tires to fit under consider the changes that makes to the KPI, scrub radius and their effect on the steering etc of the steering geometry. you don't wanna do something and find out it makes the truck really twitchy to drive or the tires or front end parts wear out fast.
a quick explanation here.
https://en.wikipedia.org/wiki/Scrub_radius
don't some guys also install the front suspension from a C10 under these trucks as well? like bolt in? maybe check the track width on some different donors? maybe try here?
http://www.crankshaftcoalition.com/w...l_measurements
suspension geometry
http://www.car-engineer.com/suspensi...icle-behavior/
or here
http://www.smartengineer.in/blog/cam...oe-in-toe-out/
have fun, post pics of what you have there and you will likely get some more feedback