Got the throttle servo installed, as well as all 4 exhaust pipes.
Thanks to this thread, It gave me a great idea, and I used the KS do it yourself muffler parts, and I got the DA 50 stub / exhaust flange (X4) and then brazed a 90 degree turn to each one.
Then I went to LOWE's and purchased two of the 24" long hot water heater pipes, cut each one in half, and then brazed the other end to the KS 90 degree tube. the tubes from KS are 25 mm OD for the DA 50.
Need to do the choke servo and install a fuel tank, gas lines, and 2 ignitions, and she will be ready for a crank up. I am excited to hear how it sounds, since all 4 cylinders have their own air exhaust exit pipe.