Alright well I have made some progress on my own and I will post my findings here to help those interested and also to keep this going until we resolve it.

Alright so the bottom board of an original Out Run has 6 EPROMS and 8 ROMS. It appears as though both original and Turbo Out Run share these same 14 rom images? So we will ignore the bottom deck of the board for this procedure.

Now, the top board of an original Out Run contains 17 EPROMS. (9 are 256's) (8 are 512's) So on a "battery dead" Turbo Out Run board, it appears as though ALL 17 of these EPROMS would need to be populated and of course the FD encryption processor swapped with a standard Motorolla 68,000 processor.

A Turbo Out Run top board contains 9 EPROMS and 10 ROMS. That makes 19 chips versus the 17 from regular Out Run. Among the EPROMS are the two extra 512's and one of the 256's is swapped with a 512 as well. The ROMS I will assume to be of the same values.

Alright so I have carefully looked over the MAME rom set for Out Run and have determined that the reason it has so many damn files is because among the files are the different revisions of rom sets (EPR vs. OPR) and (a vs. b) etc. As well as all those rom files for those little tiny IC's which we need not worry about for this project.

Alright so then turns out that (at least on paper and in theory) re-converting a Turbo Out Run back to Out Run is as simple as removing 20 chips (19 roms and 1 processor), and then placing 18 chips (17 roms and 1 processor) on the board. I will physically try this as soon as I have the chance and report my findings here so we can confirm this.

Lastly, it looks as though only 4 ROMS are "encrypted" by the FD suicide processor, so in theory replacing those 4 chips as well as the FD processor would "repair" a battery dead Turbo Out Run. Only thing is, one would need to have the 4 new and "unencrypted" rom files to program those new eprom chips with. This brings us to our LAST and KEY question of this thread...

So if EMULATED pics for turbo out run appear next to turbo out run in it's listing on system16.com then obviously SOMEBODY has the 4 "corrected" files!? The dead battery society does NOT have these files however on their site? So does one assume that these 4 files can be found in the Turbo Out Run rom set? A simple yes or no would suffice I guess. Because if they do, then the dead battery society is simply out dated and this problem is no more.

Alright well I will report my findings later on.
Regards.