I would not recommend this unless you have proper safety procedures in place and you know exactly what you’re doing and what the potential outcomes could be!
Also remember that if the spring doesn’t randomly exit stage left, right, wherever it wants under compression (potentially resulting in serious physical harm or death) that you could run the risk of deforming the spring.
And it was the Gen3 Legacy/outback platform that changed the rear suspension to a multi link setup with the coil over shock setup, this started in 1999 in Oz.
Cheers
Bennie