I have a buddy who needs to have either the synchros replaced in his 5-speed gearbox, or a replacement 5-speed transmission sold to him and installed. His car is a 1990 N/A RX-7. I believe he got into some 'sprited' shifting and driving and now he's got grinding of the gears when he shifts. He's in Tallahassee, Florida and I was wondering if anyone knew of someone reputable and honest that I could send him to for this job? Any and all replies are appreciated. Thanks!