Hey zero,
The st165 fuel rail is pretty robust, far better than the st185 one. Youll need to make some brackets to support your new injectors, as well as cups to seat them in the head. -6 an will do fine for fuel feed, make sure it goes right back to the tank. Ive modified OEM sending units to use the -6 and its pretty easy to get the fittings you need for the filter. Aeromotive, walboro, or my personal favorite would be the supra tt pump will all be up to the task of your power goals.
If I were you I would dual feed the rail, and run the return out the middle section used to feed the cold start. xiiimotorsports sells Injector Dynamics, which work great with E85. As well as all the pumps, lines, fittings you will need. Be sure to ask if you need any help
Cheers
Luke