thats a pretty nice RX-7 you got there
it looks clean, and the body is in great condition from what i can see. id say you have a nice start to a project that you will enjoy working on. i notice you plan on keeping it twin turbo, so for sure start looking at things to increase reliability with that set up.
ive only had experience with a single turbo FD, and maybe someday you should consider going that route if you ever have time/money. its been an overall positive experience for me, we dont have that mess called the rat's nest and it simplifies alot of the things going on in there.
either way goodluck and enjoy! ive always loved checking out twin turbo FDs that run great