well on that website... the package for 1699.95$ comes with the ECU and trans.. and engine mounts and all of that, but its for a Nissan... So if you were to install a FWD SR20DE (T) than.... you may have to have custom mounts made.
You will have to use the ECU and Transmission which goes with the SR20DE (T)... the mounts probable custom made and for teh drive-shaft and differentials... im not entirely sure on that.
I would reccomend going to the SR20 forums on..
SR20DE Forum
There.. everyone and everything is about this specific engine.
Good Luck.. and keep us updated
