whats needed to convert a mk1 fiesta to rwd? i have a rs1800 fiesta and would use this as a donor engine.

what gearbox?
what rear axle and suspension?
what front hubs?
what engine mounts?
what fabrication work is needed apart from a tunnel?
could a floor be cut out and used from a suitable vehicle and what car would that be?
what else is involved?
anyone got a haynes manual for the conversion

any help would be greatly appreciated