I don't have an RX-7 yet but I'm looking at one. This guy a quarter of a mile from my house has 3 1st gen rx-7s. I've seen them sitting there for at least a decade. He seems to really love the rotarys (he also had a rx-8 for a while). So on Saturday I decided to ask him if any of them were for sale.
He said the 1983, which sat for the last 6 years, he would consider selling. I don't remember the model type (srsly how many types are there for the 1st gen rx-7s????) I'm very new to the rotary scene but not new to mazdas (miata man here got a 94 had it for 3 years with almost 29k on the clock now and I love it! Been driving it a lot more lately)
After this I'm going to look at the section "what you need to look for before buying a 1st gen" and see what I can find out.
Now, I'll be frank and say this, if the rotary starts and runs fine after I check for carbon lock, I'll stick with the rotary for as long as I can. After that, (puts flamesuit on) I may stick a LSx engine in there for improved reliability and power.
So, what should I be aware of for 1983 years specifically? I'm going to look for frame rust and any significant body rust (so far the outside looks pretty darn good save for a small fender bender with the left front corner. I've tried to find info on what rear end it may possibly have (it has a 5 speed, dont remember model type what GS, gxl whatever I'm learning) vlsd or open diff?
	

