I can get another H23a1 or the F20b auto version which will mate up fine to my ms24 manual trans. Only difference between the manual and auto f20b is 20 hp from cams and throttle body. So, H23a1 is a great motor but in my opinion the downfalls are the FRM sleeves. This motor pulled my car pretty hard through the gears. The f20b auto makes 180 hp and roughly just as much torque. I need to do a little rework to get the F20b in but its not much. My only issues are ECU and availability of parts. I cant really afford an H22 so thats out. So what do you guys think. F20b or H23a1. If you have solutions to the F20bs problems let me know. I want to hear your thoughts as I am picking up the motor early tomorrow morning. FYI the F20b is 50 bucks cheaper than the H23 lol.