i think aluminum is a lot different than steel , i think aluminum is a tighter tolerance, than steel jugs or block, so pressing them out might be tough
unless its a top fuel- i have watched them get tore down ,they tear them down every race,and the sleeves on them just slide out
dont quote me -lol its been a long time since i have seen one tore down
i dont know why they dont show it in depth on the speed channel ect...