In the middle of changing the mechanical fuel pump on my 340. Having trouble locating the pushrod that runs the pump. Shouldn't I be able to push up on the rod and slide the pump arm underneath? I slid the new pump in and it seems I have to push up on the pump with a good bit of force to get the bolts to line up...is this all I need to do? Any help would be greatly appreciated. First time doing this. Thanks guys.