Automatic to Manual Conversion, any help/advice?

[RWDSteve]

I was just wondering if anyone could help with regards to converting an auto Silvia s12 to a manual. I'm quite handy with spanners but I could do with some info on whether this idea is worth considering or whether i'll end up with a gearbox that doesn't fit etc.

Also any ideas on sourcing the parts needed would be handy, as i'm a newbie to the world of Silvias

Thanx Steve