I'll be starting in the next week my custom exhaust project using mandrel bent pieces of plumbing, a Summit universal X-pipe kit, Flowmaster mufflers and prebent tailpipes. This setup will be 3" not 2.5", and I'm also welding in catalytic converters. This is actually for a 501 BBF, not a 5.0 but the tech is the same. I'll be photoing everything as I go along and posting pictures. Is anybody interested? Let me know if its worth the trouble.