I live in bergen county, New Jersey and i know i can get e85 from a place in Pennsylvania which is about 30 minutes away from me

would it be worth it to use e85?

 

Depends on if you want to go 30 miles to get fuel.

 

stock rotary won't run e85

that is IF we are talking about a rotary, don't see what kind've car we're talking about

(surprised you didn't say it first styx)

 

I am planning on buying a rotary and converting it to e85 and i would buy the fuel in a barrel

 

Flush/clean tank, new pump, new/change filter, new lines, change injectors and tuning. Then periodically drive an hour with a truck to buy fuel in bulk. Then find a suitable and legal place to store said fuel. Have pump or syphon device to transfer fuel into car. Yeah...sounds like a good plan.

 

In order to better answer your original question, please state why you want an RX-7, and why you want to convert it to run on E85. The reason for this is because there may be good reason for an E85 RX-7, or you may be better off with a different car or a different fuel, but without stating your purpose you will not get a good answer to your question.