I was wondering if anybody has converted their Z21 or early Z22 to rear exit thru hulls z21.JPG here is a picture of the rear of my boat, I would like to put them under the swim platform to ease the sound a little at idle. they exit through the sides above the waterline nowz21 side.jpg and its tough to have a conversation in the boat (good thing sometimes). I am going to be installing a roller 350 Vortec over the winter so the engine will be out anyway, the current mag is on its last leg. thanks for your help, Andy.