87base RX-7

what would it take i know the monts are diferent and i want too use the renesis trans but are they similar too the 20b or fd mounts so one of the conversion kits from them would get me close? i wont be using power steering or ac so i wont have too worry bout all that and this probaly wont happen till next summer but if u have any ideas on how too make it easier if u know anything bout it let me know id really apreciate it

thanks