Help a brother out

I'm using a tcbros hard tail kit for my 97 sporty and cannot for the life of me get the gap to fit up for welding. I tried lifting the ass end up ratcheting, banging it with mallets, pry bars to keep the engine off the frame rails. What am I doing wrong here? Right now I'm sitting with 1/4 on the backbone and about 5/8 on the bottom.