Has anyone done the v8 swap into the rx-7 that knows how much it costs and how hard it is and how about going at it?

 

search this section of the forum https://www.rx7club.com/other-engine-conversions-non-v-8-118/

you should find everything yuo could ever want to know

 

Use the search. That is what it is here for .....

 

holy crapoly, what a generalized question!?!?!?

what V8?
what year RX7?

after you narrow that down a little you can search for info!
its all been covered here.
there is NO step-by-step that I know of, although once you get the car and motor you will see how basic the swap is... remove rotary, install V8, hook **** up, done.

 

The closest you will find to step by step instructions are at www.grannysspeedshop.com

They're not perfect, but they are pretty helpful.