i have an 87 gta i recently put on an a/c delete box for an 83 camaro with no a/c it fit my firewall fine and the blower moter fit aswell but is there a diiference form a/c to non a/c blower motor the white thing on the end of the blower motor is to big for the a/c delete box when it goes throyh the delete box it hits my firewall thanx