The military had two elctronic ignition replacement kits...Used mostly in the M151s as by the time they came out those were the only gas engine trucks they had...any way one was made by prestolite the other by swiss controlls. The swiss controlls one was a drop in and fo gedda boud id system... The prestolite was a PITA! You had to adjust a gap and change the shaft that the rotor sat on. A real pain...the only good thing was that it used the standard GI rotor and cap.