Retrofit from sports suspension to original

Hello, my Chantalle one of the previous owners has missed a sports suspension (KAW; front 7.25; back 8 cm lower. The thing is stuck on the asphalt, but I have a bang with abrasions on my butt. Would like to make Chantalle a cozy travel machine again and still have the suspension of Bolero there. Can it be repaired easily or there is something special to consider. Would you like to do this as soon as the temperatures are above 0. Can I take the coupling rods from the Bolero (are only 10,000 km old)? Does anything else have to be changed?