I did the same. Did the cardboard first, then plywood and I am doing metal mock up to ensure that my measurements are good. By the looks of it, it looks as if it will work. Thanks for the heads up on the seal, I seen that in your other post. Have you checked out 40973S which is a nitrile material vice felt.


Dave


1966 Chevrolet Caprice 2 Door Hardtop (396 Big Block)
1951 GMC 9434 5 Window (waiting on a 292 transplant)