i am looking at buying a 93' R33 GTS-T, it looks like a great car, recently had a new engine installed with 90,000 on the clock, the only problem is in the description the guy explains that the Synchros in the gearbox are starting to let go but the car is still driveable, what kind of issues am i looking at here? can i easily replace the synchros & how much would i be looking at? i can do all the labour myself just need a price indication.