I believe the shroud is important. I dont know where you live but, the carrier is about four ton. It has to suck the air down the ducting , through the radiator, and then stuff it out through those two holes in front of the rear axle.If you put in a rebuilt motor, you may be up against it, if you dont have every thing in place. I think you are right to make the effort.
Sorry Rob. I,m not trying to poke you in the eye
