hmmmm...
me thinks there are more than 1 choice/possibility of motors and related ignition systems for this model truck. Please provide either year of first sale or serial number of unit, along with a description of the motor as best as you can.

All that said, -I- don't need any jumper* to put any of these optional engines 'in time", as "in time" is a mechanical relationship between engine components, and if they are 'in time' with the engine stopped, they will be **** close to 'in time' just the same once everything get spinning,

I put an asterisk on 'jumper' because I am guilty of using a wire to feel the top of the piston through the spark plug hole, to bring # up to TDC, and then check all the other components/marks