Heads, how much gain?

Didn't know about the offset shackle kit. How much more room does that give? Seems like its still tight between the inner and outer fender. I can't roll the fender lip because its got some filler in it.

Save ur coin and do it right the first time , and go for 240 trickflows, already cnc ported and can be found for under $1000 apiece , wont need anything done to them !
3/4'' OFFSET SPRING HANGARS AND TRIMMING THE LIP IUNDERNEATH WILL GIVE YOU A PRETTY GOOD TIRE .
A far as welding the spring perches , you can very carefully cut one in two , lenghth wise on a big band saw, and weld the pieces (half on one side, the other half on the other side, right up against ur existing perches , using the orig. to keep the factory angle right . Then redrill a couple holes 3/4'' over to fit the u bolts , I`ve done it and it works great .