Any way to adjust entire score's note duration?

I am arranging a stands tune for my high school marching band, and considering the songs fast nature, I started writing it in 4/4 with swung 16th notes while halving the tempo. However, to make it easier to read, I was hoping there was a way to adjust the entire score's note duration so the swung 16ths become swung 8th notes. I understand I probably should have used cut time for this, but is there a way to do this without reworking my entire score?