yep
it would help to know what make/model engine is in the lift
but as edward said, timing is all in setting #1 piston on TDC and then setting the rest of the components on thier marks

this old style with distributor? or is it electronic ignition?
u say it has ecu so can we assume it has coil packs and no distributor? It would then have a reluctor wheel or something to count revolutons on the crank somewhere. And of course you still have to deal with valve timing etc.

without knowing the make of the engine we're all just spinning our perverbial wheels so to speak ;o)

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