New bucket seat cover installation advice?

I like to zip tie the springs together to make them firmer when sitting down.

I can't for the life of me remember what it's called but I used this black canvas type nylon material in place of the burlap on the bottom. It doesn't break down or get dusty and crusty like burlap does and it does a better job. Got it off Amazon.

You'll likely want to beef up the foam if you're planning on going with used foam. First time you sit on the seat with the original foam, you'll be disappointed in the support. I'd recommend at least gluing a topper foam pad on top of the existing foam to give it a little more support.