Welcome to the forum
Looks like a clean '87, brush guard and manual hubs as well.
2.9l is a good engine, '88 and earlier heads would crack if overheated just once so pull over if temps starts to rise above 1/2 way, '89 and up heads had better design casting and fit fine on the older blocks, if the need arises.
Spark is done by the TFI module on the side of the distributor, these would get temperature sensitive when older, hard starting after engine is warmed up or misfiring after warmed up is a sign of failing TFI module.
Bottom end and timing chain seem to last forever if oil is changed.