the stock tires are probably at most 235/75R15 (~29"), Yes is does have a TTB front end with most likely an IFS Dana 28 center section and a Ford 7.5 rear, but some rangers did have a Dana 35 front and a 28 spline 8.8 rear depending on how they were bought. Some great places for him to look for info are at www.therangerstation.com and www.explorerforum.com.