Okay so I have search and tried so many different ways to put it in google or rx7club.com to find out what are the modication to put in a s4 engine into a s5 chassis. I keep getting alot of s5 blocks in s4 but not other way. Reason being I can get a clean rebuilt s4NA engine for cheap that I can use and I dont see to many na s5 swaps out there.

I mean I will still attempt it but if it will cost me more money then just getting a full turboII S5 swap I will just do that but also dont feel like ordering a $1500 swap online and not knowing the exact conditions. Any help would be great.