what can i tuck under the fender

[Ratedbforbeau]

hey guys right now i have a 76 K15, it has 2" blocks in the back with 1" addleafs,and had some leafs up front that sagged so low i had no travel at alland so i swapped for 6" leafs up front that were made for a SBC so they sag and im not sure what size it is up front, but i have 33x13.5 swampers, and they rubbed like crazy up front, got that fixed but now im curious what size lift is up front and if i went to a 6" up front and left the 3" in the back if i could fit 38.5x14.5s all the way around? heres pics of before the lift up front and after