hi, my 87 rx-7's motor just crapped out and im thinking of doing the turbo 2 swap. i know i have to have the driveshaft and diff, but do i have to swap to 5 lug before driving it? thanks in advance.

 

Read the 2nd gen FAQ. There is plenty of information on turbo swaps. The hubs have nothing to do with it.

 

You should be able to keep your current hubs

 

You can keep the hubs.
the setup will be the TII half shafts with 4 lug wheels,and Crappy brakes(fronts will be single piston Right?) but hey,at least you will have more power to Hit the Car HARDER!..J/k.
I am just trying to say that if you are putting a TII engine then you really should Upgrade the brakes too.when you can.it's only a reasonable upgrade.