I decided to install the remaining 3 exhaust pipes. This is temporary until all the fittings and such are in place and the aft exhaust pipes are then secured. It took quite a few attempts at clamping the swivel joint spring loaded fasteners on, but I got it done. The rest of the installation went rather smoothly, but it would have helped if my fingers and arms were smaller , or I had three arms and hands ,so I could get to those bolts in the back of the engine where the pipes attach to the cylinders.