I just winterize my 1988 4.3 I drained all the petcocks took all the hoses off the thermostat housing in a water pump drain all the water I took the three screws off the out drive No water came out I filled all the hoses with antifreeze the one big hose on the thermostat housing I don’t know if that goes to the power Sterring cooler or not but I drain the water out of it and I filled that full of antifreeze I filled all the hoses with antifreeze the one big hose on the thermostat housing I don’t know if that goes to the power Sterring cooler or not but I drain the water out of it and I feel that full of antifreeze am I missing anything first time ever doing this hope I didn’t screw this up .