The C2 1963 Corvette Gets The N11 Exhaust Treatment! What the 1963 Z06 Sounded Like 

@ianhunt6438 thanks for joining and commenting. Yes. I did install without lifting the body. Lessons learned are: Take off the rear filler panel ( this will alleviate the lack of space issue). Connect the exhaust manifold sections first ( the passenger side is the hardest having to deal with the heat riser valve assembly - I taped it in place while installing the studs and nuts) but keep them loose. There are two donut sleeves that you want to heat up the end to have then seat correctly prior to connecting to the exhaust manifolds. Place the welded pipes with mufflers in the crossmember while you loosely connect the muffler hangers. Heat up the front to back/male to female connection and add pipe sealer. Take your time and muscle the muffler end pushing into the front connection while twisting. This may take a few tries of heating, pushing, and turning. Ultimately you gain the muffler side space and the hangers fall in line with the bracket. Then tighten up the front studs as well as the center exhaust hanger ( 63 has a bespoke one). Hope this is helpful.