Would any 5 lug s chais hubs fit a 4 lug 87 base model really wanna swap hubs

 

The 5 lug Rx7 hubs are a direct swap for the 4 lug models. Here's what you need:

Front: Hub (new bearings are a good idea), brake caliper, rotor, pads.

Rear: Hub, rotor, brake caliper, pads. Strictly speaking I think you can swap the hub into your existing knuckle but since that requires a press I recommend just buying a set of 5 lug hubs and spindles already together if possible.