87' 302 MAF mod/ Last minute ?'s

Going to the boneyard Sunday to harvest parts for a MAF conversion of an 87'F-150 302/auto trans. Suggested target vehicles for harvesting are said to be 88'-93' mustangs, although 94' & 95' OBD1 MAF F-150 302's are known to have been made but in lesser quantities. Is scarcity the reason I haven't seen them recommended or is there some other reason, like possibly a better programed timing advance curve of a stang or tranny mismatch with the F-150's? Need to know by Sunday morning. Thanks in advance! From what I've been told, the donor computer can't be one that includes control of Tranny function as my tranny is not adaptable to computer control?