A Body 8.75 housing/axles dont match

so i bought separately "a body" axles and "a body" housing. well the axles are to long!! grr... so now i need to figure out which i right.

so the housing is 51 3/4 from housing end to housing end and the perches were 43" or 44" on center. < sorry long day

the axles are 29" from the outside of the wheel hub to the end of the splines, or 27" to that plate that bolts to the housing.

so pics or ideas on whats what? possibly later a body axles (after 73)