tti exhaust muffler selection

Last year I bought a new tti 2 1/2 inch H pipe for my cuda. I will be installing tti 1 3/4 headers. My exhaust currently is 1 3/4 Hedman headers with a home built 2 1/2 inch head pipe setup into 2 1/2 inch Dynomax Super Turbo mufflers with a reducer to stock 2 1/4 inch tailpipes. I was just going to replace the headers and H pipe and reuse the mufflers and tailpipes. I am now thinking about new 2 1/2 inch tti tailpipes and new mufflers. I like the Super Turbos, but I am thinking about the longer 25 1/2 inch models to quiet it down a bit. The ones I have are 18 1/2 inches long, and shorter than stock. The reducers I used make up the difference. I see on the tti website that the 3 inch mufflers are 23 inches long, so they obviously fit. Has anyone ever tried the longer Super Turbos with the tti head and tailpipes? Just worried if there is enough room for the extra length.