Just to be clear: $900 gets you both flywheels, inc the unobtanium LH2.4 one, and the pedal box.
Dellow were selling new aftermarket LH2.4 FWs for around $600 ($595 IIRC).
Volvo wreckers wanted $500-600 for a (more common) 240 M47 last time I asked.
I will seperate, within reason.