...how much space is there between the turbo hardware and the fender well where the battery used to be?

All the engine bay photos out there are from a standing point of view and it's hard to tell exactly. It looks like there could be room to fit a narrower group size or specialty battery in the stock box (with necessary heat shielding). I'm trying really hard to to find ways to avoid moving the battery, especially to the hatch area.

I found it easy to put the battery in the front on the drivers side. Even after I widened the radiator cradle to use the 20" (over the 17") radiator it still fit. The stock windshield washer container was removed and the Turbo Coupe model installed in the wheel well.

 Here are a few pictures. The battery tray is from the '88 Turbo Coupe donor car. The engine-less picture shows the panel I made on the passenger side. It both replaced the rusted battery tray and created room for the turbo.  That said, the outer bolt on the exhaust and the boost actuator still have minimal clearance. This is with the stock '88 IHI turbo.

dont really know.... but... it you do a little research they are all the same, from the same manufacturer, and only difference in them is stinger gave a warranty on his..its documented on turboford and on his site....he got ripped off by the distributor...

How about space in front of the turbo where the HR-980 compressor usually is?

I'm looking at using an upper intake that faces forward and it's a pain to find the early 2.3 alternator brackets. Keeping it on the passenger side solves that problem and means no wiring change.