ill explain what i did. first i found the seem by the tailgate that runs in between the bedsides. use a cut-off wheel and cut that seem out, looks like it might have silcone on the seem (i had no idea what it was). cut that seem and after that if you look behind your tail light youll follow that same seem flow around your tail light bucket. i just basically cut an inch behind the whole tail light bucket. then ran that diagonal to the seem at the tailgate. youll see what im talking about if you look. cut the floor first then work on the sides. i fallowed a perfect line on mine, not sure if youll have the same. i had inner fenders that screwed to my bedsides, exactly not sure the proper name. anyways i fallowed that down to the flor cuts and back half was off. where it was cut sand it flat (eyeballing) and measure 14" or however you choose and dow the sides first this time. floor is alittle harder to get measured right. my way is hard to explain but i measured back from the tailgate cut up 14" that would be my new cut to mate the floor together. i can post lots of pics to show you what im talking about. check in the am