[jclark003]

I had a 43 open which is a similar setup. When I pulled the aftercooler core I had one person get themselves to the outboard side where he could get at the aft end of the core (no easy feat) and another person reach over the top and grab the forward corner of the core. We then rolled the core (carefully) onto the top of the engine (covered with a moving blanket). There was just enough room to slide it over the top. Measure gap to be sure and be careful not to damage cooling fins or the manifold pressure or temp sensors.

Good luck