I figured it would help with all. The people who have done it to list what they had to do as far as mounting and the major install parts.

Custom vs bought motor mounts/ cradle
Ecu types that are good to use.
What ammenities were kept ac, electronic steering .
13bre vs 13brew which is the better choice and why

 

or you could search... Let me google that for you

 

So I won't be a dick, I'll reply:
Modified stock mounts
Megasquirt MS3 pro(I prefer Haltech p series, not as many stupid settings)
Kept everything, no reason to lose anything
13bre, chose it because of the huge ports that it has, plus easier to mount with side mounts as opposed to the brew which has the mounts going through the oil pan. Both engines have pros and cons.

 

13b-REW
RX8 Performance Mount
Adaptronic e440 wire in ECU Adaptronic E440 Universal Select Standalone ECU
I kept no amenities at all because racecar, but if you use an RX-8 front cover and throttle body, you can keep the stock ECU happy.
I chose REW because it's easier for me and are more common here.




This thread doesn't seem very useful but I figured I'd post what I'm doing anyways...