I own a '72 Datsun 240z with the 4-spd manual transmission. The motor is in HORRIBLE condition and I'm finding it near impossible to find another L-24 in decent condition. I plan to pull the motor, put in an RB25DET, and rebuild the L-24. I will probably "race it out" with seats, harnesses, etc. But I know that I will eventually want the car to be completely original, so Im keeping all that I'm replacing. My mother owned an '88 300ZX Turbo (that i now own), my father owned a 280ZX, and I now have a 240Z.