i need help! I have a plain 91' sentra E model and i know i can convert it to a 12sec car but i cant figure out what engine i need to complete this project. i know i need a sr20det but which, bluebird sr20 costs $2600 and the GTi-R costs $3400(without trans). this should be a fairly ez project because i have got the sr20 trans and i can get the JWT ECU and cams is there anything else that i need to do the swap????