No, you simply can not do this. The chassis is completely different.
Yes, there is a transmission in a 1990 Mazda RX7 convertible.
Replace the convertible door seal.
You go to servicing
I had a 1988 convertible that averaged 22-25 mpg.
As long as its the FC3S model it will fit.
Under the back cover . Just behind the doors on either side ...
more work than money
There is no such thing as a turbo II convertible. It might have been a turbo II motor swap but its still just a convertible. It will be where the normal convertible fuse boxes are. 1 is under the steering wheel to the left. The second is under the passenger kick pannel. the third is under the hood
From everything I have ever seen, no. I have not come across anything suggesting an RX7 ever had AWD.
Yes. You must take the engine apart.
nope, the starter should be right at the bottom of the transmission on the driverside.