[PHAT TONY]

Try pushing the firewall/cowl back with the doors on to make sure alignment is possible; straight gap down the door and along the rocker; if not enough rocker left then run a straight edge along the lower bodyline for reference. If you're chopping it in half how it fits now is of no real worry. Have you read through "I've decided on a build "theme"" yet? They chopped it in half there...