i have about 3" on my 81 with RUF and f150s on 35s and it needs 37s. 4" uptravel at all 4 corners. you need to look at build threads and think about what you want to use your truck for and then buy springs that fit your application. i have $50 in my setup and it works very well...i just couldnt see spending $5-600 on leaf springs, that money could be spent better elsewhere on the truck. i have ridden in trucks with more lift and where we wheel(lots of muddy hills, off camber descents) a little lower(and some width) helps you feel a lot more stable. front springs- top three leaves from 81 pack, bottom leaves from 87 pack cut down. rear springs-f150 main and second leaf, 88 toy leaf, chevy antiwrap. good luck with your build.