that thing looks like it wheels nicely!! your front springs are doing their job well!  i have some friendly advice.....i find that the 63" chevy springs flex better with 3 leaves in the pack instead of 4.   the 4 leaf chevy packs are off of 4x4 chevys. the 3 leaf packs are off of a 2wd. the 4 leaf chevy pack is a little bit much for a little toyota.  you would get more flex and a softer ride out of them if you pulled a leaf out. but if you are happy with them now i would just leave them the way they are.  at one point, i tired having just 2 leaves in mine. that was way too soft though! sure flexed good though....
just my cause i know everybody likes more articulation