The 2015 Street Machine Natonals in DuQuoin, IL, was a great place to tavel back in time to see some of the most iconic Pro Street car from the era.     Cars like Troy Trepanier's "ProBox" 1960 Impala, Gary Buckle's 1971 Camaro, Matt & Debbie Hay's Thunderbird, and many more were on-hand in the Legends of Pro Street aisle.    We snapped a bunch of photos of the event, including a few of the V8 Speed & Resto Shop-built 1969 Camaro "ZR9" as it made it's public debut!