71 Duster 360 turbo build

I saw the trigger wheel site, but need the inner diameter to be right about 4.25” to fit onto the stock pulley. I don’t trust myself to makeup the gap without it being out of round. I’m also still on the stock damper which doesn’t allow a wheel to sit flush so I have one on its way(backordered) from blueprint.

I’m after a setup like this:

View attachment 1715786505
I had mine made here. Cost about $40 shipped. I still have the design file if interested. It was a little tight so I had the machine shop turn it down a hair and it pressed on perfectly and then I tacked it.
https://www.badappleproducts.com/