84 4Ks waterpump or waterpump with housing

[Donald Lamond]

I'm in the process of replacing my tb and notice that a lot of listers
include a waterpump.  Sounds good to me, however when I looked at the
TPC list of parts, they list it two ways.  With or without housing.  Is
there any way of determining if a new housing is needed before the parts
are ordered . This is my everyday car so I would prefer to have the
parts on hand rather than have to wait for a second UPS shipment.
Vehicle is a 1984  4Ks  completely stock and has the 1.8 JN engine.

TIA,
Donald
84  4Ks