Just went through the same issue with my radiator on my M3 halftrack. #1 As you stated, no armor, you need the room to work. #2 Remove the fan, you can put it on and a line the bolts later #3 pick the radiator up from the mounting bolts on either side where the braces mount, I used a engine hoist centered above it. #4 You have to pick it up this way so that you can swing the radiator forward and backward to get it installed. #5 make sure the shroud is on #6 Slowly lower the radiator into position, you will notice that the shroud will hit the front of the water pump where the fan mounts #7 At this point, you need to tip the top of the radiator towards the back of the halftrack and pull the bottom of the radiator forward. This should clear the water pump by about a 1/4 of an inch This does take two people one on the hoist and one moving the radiator around. #8 Slowly lower into position pulling it forward on the bottom lowering it into the mounting bracket. I have used this technique about 1/2 dozen times, it works, take care. Capt Dave
