that will atleast tell you how far off, if at all, the rear end is
and to make you think the worst: didnt you do the "right" way to get rid of wheel hop? didnt you drop the rear subframe and whatnot? that could possibly have thrown the rear off a bit. i would deffently go get the alignment checked. when you go just tell the guy youre more interested in seeing how the rear sits (thrust angle)