it has been doen before talk to yury at heavy throttle or go to unstable hybrids the motor is very enexpensive (compared to other rb) but it cost the same as the sr 20. ni many people do that swap nore to they have the part when something breaks so thats more down time when you are getting things shipped from japan. the only benifit is the rb20det is a straight 6 more tourqe. go with the sr more parts for it more room for upgrades and its safer