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nlast = "smith"
nfirst = "john"
nstreet = "1234 Anywhere Ave"
nstate = "OK"

nlast   = "smith"
nfirst  = "john"
nstreet = "1234 Anywhere Ave"
nstate  = "OK"

F7::
 alignto = 0
 Clipboard =
 Send, ^c
 ClipWait
 Loop, parse, clipboard, `n, `r
 {
  Haystack = %A_LoopField%
  Needle = `=
  StringGetPos, pos, Haystack, %Needle%
  MsgBox, %A_LoopField% `n %pos%
  if (pos > alignto)
  {
    alignto = %pos%
  }
 }
 MsgBox, %alignto%

 Loop, parse, clipboard, `n, `r
 {
  Haystack = %A_LoopField%
  Needle = %A_Space%
  StringGetPos, pos, Haystack, %Needle%
  MsgBox, %A_LoopField% `n %pos%
 }
return

F7::
   Clipboard :=
   Send, ^c
   ClipWait
   StringReplace, clipboard, clipboard, nlast, nlast%A_Space%%A_Space%
   StringReplace, clipboard, clipboard, nfirst, nfirst%A_Space%
   StringReplace, clipboard, clipboard, nstate, nstate%A_Space%
   Send, ^v
return

pad := "         " ; you need to change just the padding length
loop, parse, clipboard, `n,`r
{   
   RegExMatch(A_LoopField, "\s*(.*)\s*=\s*(.*)\s*", v)
   outVar .= v1 <> "" ? substr(v1 pad, 1, StrLen(pad))  "= " v2 "`n" : ""
}
clipboard := outvar
send ^v