farmkid
Back when there were lots of these engines around here , "coal trucks" the HOT setup was to disconect the govener, put a bigger carb on it , 780 hollys were popular set the timing up a couple of degrees, The factory exhaust was too restrictive , we used to make our own mufflers out of well casing. But whatever you do pay attention to the RPM's these old girls don't take any over revving !! 3400 to 3500 rpm's is about it.
I hope this helps HOTWRENCH