Upper control arms

6pk2goDemon is correct. 73-76 uses the larger upper BJ and will work with the BBP swap/conversion.

thanks
James
I'm a newb on the forum not sure how to post but I have a question.
I am working on a 75 dart sport was a slant six drum brakes I am reading different things about the uca's I want to convert to disc in the front but am being told I will need to change the uca's others say I already have the lbj how do I tell if I have the lbj's
I am installing a 360 in it also. will I need to change the tranny cross member?