Many broadheads in that time period used a long taper. It is stronger than a short taper as there is more surface area. Look at the Grizzly or the new Tuffhead...do you think that long ferrule is there so you use a short shaft taper?
I can do a long taper with my old 3 rivers taper tool, just move the adjustment pin/rod. Ace had taper and tenon bits that were designed to be installed on a lathe or perhaps drill press.