How do you tell FWD from AWD flywheel?

[sleepydsm]

1992 AWD 5spd.

Is there any way I can tell if a flywheel is for FWD or AWD? Does anyone know the appox. weight of each? I guess I can just weigh them. I have a spare flywheel in my box of crap in nice shape, I might use it if my current one has cracks (gonna get it magnafluxed).

Thanks.