Thank you both for replying to my Help Request. I believe he is looking for the shirts to be appliqued into the shape of his "81". I thought I would cut the numbers out of bleached muslin with pinking shears, applique the T-shirt pieces (with stabilizer on the back of the pieces) using a "quilt as you go" method to attach the shirts to the muslin, so the stitches don't show. The edges of the numbers will be bound with white binding to enclose all the edges and outline the numbers to make them stand out against the dark green background. The numbers will be pinned to the quilt top and machine sewn in place. I'm planning on making the quilt 104" wide by 100" long. It's going to be a challenge quilt for sure! Thanks again for sharing your suggestions.
Kim B