The_Family_Tahoe
I'm Awesome
It is a big deal. You would be wise beyond your experience not to use a torch.This is my go-to for everything now. Ever since I bought one I keep finding new uses for it.
Springs + heat is generally a no-no. It may not be as big of a deal as I'm imagining but I'd rather not risk it.
Source: I've used a torch to remove old leaf spring bushings.
Spoiler alert: it changes the spring rate