225 and auto trans for a 8.75

hello, I'm new to this forum. just picked up a 67 dart GT, going total custom on this one with a 5.7 hemi. I'm in need of a 8 3/4 complet rear end, have 225 CI and auto trans and 7 1/4 for trade. or is the shipping cost to high? if the photo attached it's my son's 62 d-100.